To 'be strengthened,' as in Genesis 21:18, signifies being supported.

In Isaiah 41:10, this signifies to give power and intelligence from the omnipotence and omniscience of the Divine Good and Truth. (Apocalypse Explained 298[10])

(참조: Arcana Coelestia 2698)

667. 'He was to enter into the ark, he and his sons, and his wife, and his sons' wives' means that he would be saved. This is clear from what has been stated already, and from what follows, to the effect that he was saved because he had been regenerated.