Our Lord, seeing Peter's general design good, though he mistook as to this particular act, tells him, that at present he did not understand his counsel and design in this action, but it should be more intelligible unto him afterwards; as indeed he made it by his discourse upon this his act of humiliation, 1 Thessalonians 13:13-16.
Related Commentaries of John 13:7
John 13:7
7 Jesus answered and said unto him,What I do thou knowest not now; but thou shalt know hereafter.