Commentaries:
Barnes' Notes
Thou knowest not now - Though he saw the action of Jesus, yet he did not fully understand the design of it. It was a symbolical action, inculcating a lesson of humility, and intended to teach it to them in such a manner that it would be impossible for them ever to forget it. Had he simply commanded them to be humble, it would have been far less forcible and impressive than when they saw him actually performing the office of a servant.
Shalt know hereafter - Jesus at that time partially explained it John 13:14-15; but he was teaching them by this expressive act a lesson which they would continue to learn all their lives. Every day they would see more and more the necessity of humility and of kindness to each other, and would see that they were the servants of Christ and of the church, and ought not to aspire to honors and offices, but to be willing to perform the humblest service to benefit the world. And we may remark here that God often does things which we do not fully understand now, but which we may hereafter. He often afflicts us; he disappoints us; he frustrates our plans. Why it is we do not know now, but we yet shall learn that it was for our good, and designed to teach us some important lesson of humility and piety. So he will, in heaven, scatter all doubts, remove all difficulties, and show us the reason of the whole of his mysterious dealings in his leading us in the way to our future rest. We ought also, in view of this, to submit ourselves to him; to hush every murmur, and to believe that he does all things well. It is one evidence of piety when we are willing to receive affliction at the hand of God, the reason of which we cannot see, content with the belief that we may see it hereafter; or, even if we never do, still having so much confidence in God as to believe that what He does is right.
Other Barnes' Notes entries containing John 13:7:
Matthew 23:6
Matthew 26:20
Luke 12:37
Luke 22:26-27
Philippians 2:7
1 Timothy 5:10
Hebrews 1:14
DISCLAIMER: Church of the Great God (CGG) provides these resources to aid the individual in studying the Bible. However, it is up to the individual to "prove all things, and hold fast to that which is good" (I Thessalonians 5:21). The content of these resources does not necessarily reflect the views of CGG. They are provided for information purposes only.
