Jn. 14:15, KJV. Jesus also said, He that saith, I know Him, and keepeth not His commandments, is a liar, and the truth is not in him 1Jn. 2:4, KJV. It will never be difficult to recognize a true Christian because there will be total obedience to God's commandments, the first four demonstrating his love for God and the last six demonstrating his love for his fellow man.