"[T]here are those who hear but don’t do, they have a head knowledge without a heart knowledge. The first group has empty words the second group has empty hearts. And people can be deceived either way, a mere verbal profession you just keep saying it and saying it until finally you’ve convince yourself it must be true even though there’s no evidence. Or a head knowledge which seems to suffice for a real heart relationship. There are some people who are deceived into thinking they’re Christians because they know so much about Christianity. Just like there are people who think they’re Christians because they say so much about it.

Now in verses 24 to 27 the Lord again reminds us that the standard of righteousness is required for entering the Kingdom of God, and unless your life is built on that standard no matter what it looks like and no matter what you know in your head and no matter how feverishly you conduct your spiritual activity when the flood comes you’re going to get washed away, if all you have is a head knowledge.'

Some people listen and understand.  The wise do something about it.  Jesus closed His sermon in Mat. 7 with an invitation.  He warned that you will be deceived by others and you will be deceived by yourself.  Those who say, but do not do are mere professors of faith.  They may say that they belong to the kingdom.  They may have head-knowledge but their heart is far from God.  Is your trust built on the Rock, which is the Word of God or is your trust on shifting sand?... 

...It’s very easy to build on sand, you don’t have to dig, you don’t have to do anything just like going on the broad road you just go on with all your garbage, have a great old time, lots of room, do anything you want, plenty of tolerance, and this is the way it is with the fool."  End quote.