Response to comment [from other]:  "What is sin?"

That which is opposed to good.

"Sin: Defined as: transgression (1 John 3:4), unrighteousness (1 John 5:17), omission of known duty (James 4:17), not from faith (Rom 14:23), thought of foolishness (Prov. 24:9); Sources of, in: Satan (John 8:44), man’s heart (Matt. 15:19, 20), lust (James 1:15), Adam’s transgression (Rom. 5:12, 16), natural birth (Ps. 51:5); Kinds of: national (Prov. 14:34), personal (Josh. 7:20), secret (Ps. 90:8), presumptuous (Ps. 19:13), open (1 Tim. 5:24), shameless (Is. 3:9), youthful (Ps. 25:7), public (2 Sam. 24:10, 17), unforgiveable (Matt. 12:21, 32; John 8:24), of ignorance (Lev. 4:2), willfully (Heb. 10:26); Consequences of, among the unregenerate: blindness (John 9:41; 2 Cor. 4:3, 4), servitude (John 8:34), irreconcilable (1 Tim. 3:1–7), death (Rom. 6:23); God’s attitude toward: withholds men from (Gen. 20:6), punishes for (Ex. 32:34), provides a fountain for (Zech. 13:1), blots out (Is. 44:22), casts away (Mic. 7:19), forgives (Ex. 34:7), remembers no more (Jer. 31:34); Christ’s relationship to: free of (1 John 3:5), knew no (2 Cor. 5:21), makes men conscious of (John 15:22, 24), died for our (1 Cor. 15:3), as an offering for (Is. 53:10; Heb. 9:28), substitutionary (Is. 53:5, 6; Matt. 26:28), takes it away (John 1:29), saves His people from (Matt. 1:21), has power to forgive (Matt. 9:6), makes propitiation for (Heb. 2:17), purges our (Heb. 1:3), cleanses us from (1 John 1:7, 9), washes us from (Rev. 1:5); Regenerate must: acknowledge (Ps. 32:5), confess (Ps. 51:3, 4), be sorry for (Ps. 38:18), not serve (Rom. 6:6), not obey (Rom. 6:6, 12), subdue (Rom. 6:14–22), lay aside (Heb. 12:1), resist (Heb. 12:4), keep from (Ps. 19:13); Helps against: use God’s Word (Ps. 119:11), guard the tongue (Ps. 39:1), walk in the Spirit (Rom. 8:1–14), avoid evil companions (1 Tim. 5:22), confess to the Lord (1 John 1:8, 9), exercise love (1 Pet. 4:8), go to the Advocate (1 John 2:1).

Sin—wrongdoing; transgression: wilderness between the Red Sea and Sinai (Ex. 16:1), city of Egypt (Ezek. 30:15, 16)." Thomas Nelson Publishers. (1996). Nelson’s quick reference topical Bible index (p. 577). Nashville, TN: Thomas Nelson Publishers.

"What is good?"

What God has said (Ps. 145:9). Out of nothing, he created the world (Ge 1:1). He called it good. There was nothing. He created something and it was good (Ge 1:31).

 

"Sin is anything that happens in your heart that conflicts with the will and desires of God. Doing anything God has forbidden is sin. Failing to do anything God has commanded is sin. Loving something God hates or not loving something or someone that God loves is sin. Preferring anything--anything over nearness to God is sin." ~ Daryl Ferguson 

He will not let the guilty go unpunished (Nah 1:3).

What is sin?