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])

(Odkazy: Arcana Coelestia 2698)

1552. 'And gold' means goods deriving from truths. This is clear from the meaning of 'gold' as celestial good, or the good of wisdom and love, as is clear from what has just been shown and also from what was shown previously in 113. That here they are goods deriving from truths follows from what was stated in the previous chapter about the Lord's joining intellectual truths to celestial things.