John 7:14-19 - Who does he get it from?

When the festival was already halfway through, Jesus went up to the Temple courts and he began to teach. Then the Jewish crowds were wondering and said 'How does this man have so much learning, not having been trained?' Jesus answered them 'My teaching does not come from me but from the one who sent me. If anyone chooses to do his will, they will know about my teaching whether it is from God or whether I speak on my own authority. The one speaking on their own authority seeks their own glory. The one seeking the glory of the one who sent them - that one is truthful and injustice is not in them. Did not Moses give you the Law? Yet none of you keeps the Law. Why do you seek to kill me?' O Love, O God who created me, in your love recreate me. O Love, who redeemed me, fill up in me whatever part of your love has fallen into neglect within me. O Love, O God, who first loved me, grant that with my whole heart, and with my whole soul, and with my whole strength, I may love you. Gertrude the Great