In Luke 22:44, this signifies temptation even unto death. Hell would have been unable to approach the Lord if He had been born Divine, i.e., without the tendency to evil inherited from the mother; so He was willing to be born as another man. He could have assumed the Human Essence without birth, but no evil could then have adhered to it, and He could not have been tempted. As it was, He could fight against evil from His Own Power. (Arcana Coelestia 1573)