He tells them, that it is not the bare comprehension of these things in their notion that would do them any good, unless they brought their knowledge into practice; for to him that knoweth to do good, and doeth it not, it is sin, James 4:17. Faith without works is dead, and the knowledge of our Master's will, if we do it not, doth but expose us to many stripes.
Related Commentaries of John 13:17
John 13:17
17 If ye know these things, happy are ye if ye do them.