In this 2 part sermon, John MacArthur pours out his heart to exposit on the passage:
Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works? And then will I profess unto them, I never knew you: depart from me, ye that work iniquity. Therefore whosoever heareth these sayings of mine, and doeth them, I will liken him unto a wise man, which built his house upon a rock: And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell not: for it was founded upon a rock. And every one that heareth these sayings of mine, and doeth them not, shall be likened unto a foolish man, which built his house upon the sand: And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell: and great was the fall of it. And it came to pass, when Jesus had ended these sayings, the people were astonished at his doctrine
Matthew 7:22-28 (KJV)
Pastor MacArthur explains what he sees as marks of a true believer, and the evidences that expose those who may be false and self deceived "followers" of Christ.
False "believers":
1. Want signs and healings
2. Want gimmicks
3. Want to feel good
4. Want to receive blessings
5. Or they may be religionists. Many "Christians" that aren't are simply trying to work their way there by doing all the moral and religious works they believe will make them good enough...
True believers:
1. Want only Jesus
2. Are penitent and truly sorry for their sins
He says much more, take a listen...the good medicine convicts and brings you truly to the throne of forgiveness and God's grace: