1John.2.4

He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.

1John.2.4

If someone claims, "I know him well!" but doesn't keep his commandments, he's obviously a liar. His life doesn't match his words.

1John.2.4

The man who says, "I know him," but does not do what he commands is a liar, and the truth is not in him.

1John.2.4

He who says, "I know Him," and does not keep His commandments, is a liar, and the truth is not in him.