On Luke 24:27, CHS has great thoughts,:
"The two disciples on the road to Emmaus had a most profitable journey. Their companion and teacher was the best of tutors; the interpreter one of a thousand, in whom are hid all the treasures of wisdom and knowledge. The Lord Jesus condescended to become a preacher of the gospel, and he was not ashamed to exercise his calling before an audience of two persons, neither does he now refuse to become the teacher of even one. Let us court the company of so excellent an Instructor, for till he is made unto us wisdom we shall never be wise unto salvation.
"The favoured pair were led to consider the best of subjects, for Jesus spake of Jesus, and expounded the things concerning himself. Here the diamond cut the diamond, and what could be more admirable? The Master of the House unlocked his own doors, conducted the guests to his table, and placed his own dainties upon it. He who hid the treasure in the field himself guided the searchers to it. Our Lord would naturally discourse upon the sweetest of topics, and he could find none sweeter than his own person and work: with an eye to these we should always search the Word. O for grace to study the Bible with Jesus as both our teacher and our lesson!" (Charles H. Spurgeon, Morning/Evening for January 18 pm)
Best teacher, best textbook, best subject. Jesus didn't bring forth new revelation, but opened up the old.