Charles Ellicott Commentary John 6:38

"For I am come down from heaven, not to do mine own will, but the will of him that sent me." — John 6:38 (ASV)

Not to do mine own will.—Compare to John 5:30. He has spoken of the Father’s gift and of human action. He now once more identifies His own will with that of the Father, and yet states the fact of His possessing an independent will.

It cannot be that He should cast out any one who comes. He knows, indeed, with the knowledge of human nature, how hard it is for men to read the spiritual through the sensuous, and what are the hindrances in the way of every seeker of truth. Added to this, He knows, with a divine knowledge, what is the infinite love of the Father, and He has Himself come down from heaven to fulfill heaven’s will in love to man.