The Bible and Real Life: God's Word and Everyday Ethics by John MacArthur

It is common in the evangelical church today for people to verbally acknowledge that the Bible, as God’s Word, is the final authority for both what they believe and how they live. Yet in reality, a clear connection between that public confession and personal conduct is rare.

Claiming that Scripture is true and complete should preclude evangelicals from turning to other sources for establishing thought and life. Yet many do just that. In cosmology, for example, a straightforward reading of Genesis 1–2 is often dismissed on the basis of modern evolutionary theories. In apologetics, philosophy and human reason frequently take precedence over Scripture. And in church growth, demographic surveys, marketing techniques, and a man-centered theology with a watered-down gospel override clear biblical truth.

To this list, the subject of morality and ethics must be added. Instead of looking to the Bible, many professing Christians look to psychology and sociology for supposed solutions to personal needs and social ills. The rise of postmodern thought has similarly skewed the church’s understanding of right and wrong—as an unbiblical tolerance (in the name of love) has weakened churches to the point where they are as soft on truth as they are on sin. Popular television shows, from Oprah to The Tonight Show to the average sitcom, have had a tangible effect (and not for the better) on how American Christians think through everyday issues. The political arena, too, has played a major role in shaping an evangelical understanding of morality, as words such as Republican and Democrat or liberal and conservative have come to redefine the difference between what is good and what is evil.

The fact is that far too many professing Christians live their lives, day in and day out, on the basis of something other than the Bible. As a result, their priorities reflect the world’s priorities, not God’s. Their patterns of behavior and their plans for the future differ only slightly from those of their unsaved friends and neighbors. Their expenditures reveal that their perspective is temporal, and that they are vainly pursuing the elusive American Dream. Their shortcomings, when they admit to them, receive the same fault-free labels that the world ascribes (“mistakes” or “diseases” or “addictions” rather than “sins”), as they search for answers in psychology, medication, or the self-help section of the bookstore. Though they adhere to an external form of traditional Christian moralism, there isn’t anything particularly biblical or Christ-centered about how they live.

Yet it is in the lives of sinners who have been transformed by the gospel of grace that a distinctly Christian ethic must be fleshed out. True Christianity is not defined on the basis of external moralism, religious traditionalism, or partisan politics, but on the basis of a personal love for Jesus Christ and a desire to follow Him no matter what the cost (John 14:15). It is only because believers have been transformed on the inside (through the regeneration of the Holy Spirit) that they are able to exhibit godliness in their behavior. And the world cannot help but take notice. As Jesus told His hearers in the Sermon on the Mount, “Let your light shine before men in such a way that they may see your good works, and glorify your Father who is in heaven” (Matthew 5:16; cf. 1 Peter 2:12).

The Heart of the Christian Ethic 

The heart of the Christian ethic, of course, is the gospel. Only those who have been transformed from within (Titus 3:5-8), being indwelt by the Spirit of God (Romans 8:13-14), are able to exhibit genuine holiness (Galatians 5:22-23; 1 Peter 1:16). Biblical Christianity is not primarily concerned with external behavior modification (cf. Matthew 5–7), but with a change of heart that subsequently manifests itself in a changed life (1 Corinthians 6:9-11).

A true Christian ethic, then, is not possible without the regenerating work of the Holy Spirit. Unless the inner man is washed first, external morality and religious observances are only a superficial façade. Jesus rebuked the hypocrites of His day with these words: “Woe to you, scribes and Pharisees, hypocrites! For you are like whitewashed tombs which on the outside appear beautiful, but inside they are full of dead men’s bones and all uncleanness” (Matthew 23:27). Christ was not saying that behavior is unimportant. But rather that from God’s perspective, the heart is what matters most (cf. 1 Samuel 16:7; Mark 12:30-31).

Of course, a heart that has been truly transformed by God will respond in love to His Son, Jesus Christ (cf. John 8:42). And those who love Jesus Christ will eagerly desire to follow and obey His commands (John 14:15), as found in His Word (cf. Colossians 3:16). A truly Christian ethic, then, eagerly affirms and applies the moral instructions found in the Bible. But it does not do so in an attempt to legalistically earn salvation (Isaiah 64:6). Rather, having received salvation as the free gift of God through faith in Christ (Ephesians 2:8-9), it readily obeys out of a heart of love (Ephesians 2:10).

If Christians are to live in keeping with who they are as children of God, they must live according to the Word of God through the power of His Spirit. No other source of wisdom or moral insight will do. By definition, they are people of the Book—and not just on Sundays, but every day of the week (cf. Isaiah 66:2).

The Total Sufficiency of Scripture

Psalm 19:7-9 is one of the clearest and most concise sections of Scripture detailing the sufficiency and authority of Scripture, especially as it applies to everyday Christian living.1 In that passage, we learn first of all that the “law of the LORD is perfect, restoring the soul” (verse 7a). The Hebrew word translated “perfect” means complete or whole; and “soul” actually speaks of the whole inner person. Thus, God’s Word is sufficient to transform people completely from within, beginning with conversion and extending to the sanctification of the whole person (2 Timothy 3:15-17). Unlike the imperfect and incomplete wisdom of men (1 Corinthians 1:18-31; 2:10-16), the Bible is so comprehensive that by pointing sinners to Jesus Christ it can change people, through the power of the Holy Spirit, into whom God desires them to be.

Psalm 19:7 goes on to assert that “the testimony of the LORD is sure, making wise the simple.” God’s Word is His “testimony” to us about Himself, for if He had not revealed Himself to us we would have no way to know about Him or His requirements for us. God’s self-testimony in Scripture is absolutely trustworthy—His promises can be believed and His prescriptions obeyed. Those who do so will find wisdom, which in the Old Testament refers to the skill of godly living. The Bible, then, can take naive, uninstructed, and undiscerning people and make them skilled in wise decision-making and practical holiness. Scripture touches every area of life, including how we think, what we say, what we do, and why we do it. Everything we need to know to live a godly life is covered in the pages of God’s Word. Nothing else is necessary.

Third, the psalmist notes that “the precepts of the LORD are right, rejoicing the heart” (19:8a), meaning that the divine principles found in Scripture lay out a sure path for us to follow. God has given us His Word so that we can successfully navigate our way through this life, and as we do so, we will experience true joy. Ironically, those who run away from the Word of God (to any other source of supposed wisdom) simultaneously run away from joy and peace. Too many Christians think they will find happiness in riches, accomplishment, or fame. But these worldly allurements are nothing more than mirages, as Solomon found out the hard way (Ecclesiastes 2:1-26). Though our world often views biblical morality as an obstacle to happiness, nothing could be further from the truth. Lasting happiness, fulfillment, and satisfaction cannot be found in the sensual pleasures of sin. They are instead found only in God.

Next, the psalmist writes, “The commandment of the LORD is pure, enlightening the eyes” (19:8b). The Word of God that we are commanded to obey is “pure,” meaning clear or understandable. To be sure, some sections are more difficult to understand than others (2 Peter 3:15–16), but in general the Word of God is unmistakably plain. It is not mystifying, confusing, or puzzling. Its message of salvation is not hard to understand, and it leaves no doubt as to necessary truth. In the midst of a world characterized by darkness and confusion, the Word of God brings clarity. Through the Scriptures, we can know truth in a world that is searching for it; we can understand right and wrong in a society that cannot tell the difference; and we can be comforted in times when those around us are more difficult to understand than others (2 Peter 3:15–16), but in general the Word of God is unmistakably plain. It is not mystifying, confusing, or puzzling. Its message of salvation is not hard to understand, and it leaves no doubt as to necessary truth. In the midst of a world characterized by darkness and confusion, the Word of God brings clarity. Through the Scriptures, we can know truth in a world that is searching for it; we can understand right and wrong in a society that cannot tell the difference; and we can be comforted in times when those around us are worried by what is happening.

The simplest Christian knows a lot of things that many scholarly unbelievers do not know (Psalm 119:99). We know how the world came to be. We know where humanity began and what our purpose is in this life. We know how sinful men and women can be made right with their Creator. We know what the ultimate future of our planet will be. And we know what will happen to us after we die. When someone loses a child or a spouse, when national or personal crises arise, when economic or natural disasters take place—where can we go for the dark things of life to be made clear? For a world clouded in confusion, God’s Word offers sanity, clarity, and hope.

Psalm 19 continues in verse 9 by noting that “the fear of the LORD is clean, enduring forever.” The Bible conveys the awesome grandeur of God and thereby invokes in us a reverential awe (or fear) that draws us to worship our Creator. Thus, the Scriptures give us the right way to worship the true God. There is no taint of evil or impurity in the Bible’s presentation of God or His expectations. The words of the Bible are pure words that produce a holy reverence for God (cf. Psalm 12:6). And they endure forever, meaning they can always be trusted, at any time and in any age. Moreover, the worship they command will characterize the people of God not just in this life, but also for eternity.

Critics and skeptics (and sometimes even professing Christians) may claim that the Bible is not sophisticated enough for modern times. Such claims only expose their own foolishness. The Bible is absolutely pure, flawless, and error-free. There is no need to update, edit, or refine it. It is perfect. When I was in college I learned about philosophy. Almost every philosophy I studied was already long dead. I also had to learn about psychology. Almost every form of psychotherapy I read about back then is now obsolete and has been replaced by new theories or techniques. But there’s one thing that never changes, and that is the eternal Word of God. It is always relevant.

Finally, and most pointedly, Psalm 19:9 says that “the judgments of the LORD are true; they are righteous altogether.” In Scripture, the Judge of all the earth has revealed to us His decrees and determinations. Thus, the Bible speaks truth without compromise and without apology. Christians therefore need not play the postmodern shell games that try to redefine truth. The Word of God is truth (John 17:17). It is eternally true, because its Author is eternally true. It is “righteous altogether” because it reflects the One who wrote it. In all of its comprehensiveness, it is not only without error, but it is a sufficient source of truth. Nothing needs to be added to it, and nothing subtracted from it (Deuteronomy 4:2; Revelation 22:18-19). In its wholeness it is perfect, and it produces that completeness in those who are transformed by its power (2 Timothy 3:16-17).

I remember meeting a young man on drugs who was living in an overturned refrigerator box by a stream in the mountains of northern California. I was hiking through the area and asked if I could introduce myself. We talked a little while. It turned out he was a graduate of Boston University. He said, “I’ve escaped.” I asked, “Have you found the answers?” “No,” he said, “but at least I’ve gotten myself into a situation where I don’t ask the questions.” How hopeless! But such is the despair and dejection of those who do not have the truth.

Scripture describes some people as “always learning and never able to come to the knowledge of the truth” (2 Timothy 3:7). That is not referring to intellectual truth or the wisdom of this world; it is referring instead to the truth of life, death, God, man, sin, right, wrong, heaven, hell, hope, joy, and peace. People cannot find that kind of truth on their own. That is why God has given us His Word.

Putting It All Together

These few lines from Psalm 19 beautifully underscore the fact that God’s Word must be our final rule of faith and practice. It is the basis and determiner of a truly Christian ethic. Consisting of the revealed knowledge of God, the Bible is everything we need for life and godliness (2 Peter 1:3). Why would we look elsewhere for how to live this life when we have the answers from the Creator and Judge Himself?

Every time we pick up the Bible, we pick up the truth. Jesus said, “If you continue in My word…you will know the truth, and the truth will make you free” (John 8:31-32). Man will search and struggle and grapple and grope for the truth until he finds it. Only then is he free. The Bible is the final source of truth—about God, creation, life, death, men, women, children, husbands, wives, fathers, mothers, friends, and enemies. It shows us how to live, and to do so abundantly.

Any ethic that starts outside of Scripture, or that does not have Scripture as its foundation, may not rightly be called a Christian ethic. Our response to moral questions is not determined by politics, economics, personal preference, popular opinion, or human reasoning. It is, instead, grounded in what God has told us is true about ourselves and our world.

For each of us, our own Christian ethic begins with daily obedience, which stems from a heart that loves Jesus Christ (cf. John 14:15). God’s expectations for us are clearly laid out in His Word. Thus, if we are to practically apply true godliness and righteousness, we must know and submit to the Scriptures. They are perfect, sure, right, pure, clean, and true.

The Scriptures are our authority because God is our authority, and His Word stands forever. To sidestep or ignore the Bible not only ensures moral disaster, it also slights the Author of the Bible. May we honor Him by living and thinking according to His Word. MacArthur, ppg. 7-14.