Our Lord shews here that He did not undergo His passion unwillingly; but for the salvation of the world. He then gives the difference between the shepherd and the hireling: But he that is an hireling, and not the shepherd, whose own the sheep are not, seeth the wolf coming, and leaveth the sheep, and fleeth.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. lx. 5