55:10 rain cometh down. Here is a beautiful anticipation and spiritual application of science’s hydrologic cycle. The rain and snow fall from the heavens and eventually return there, but not until they have done their providential work of watering the earth to provide and renew the world’s food supply. Analogously, God’s Word goes forth from heaven and yet is forever settled there (Psalm 119:89), returning after it has accomplished God’s spiritual work on earth.
55:11 not return unto me void. The fruitful spreading of God’s Word is presented in many Scriptures (e.g., Ecclesiastes 11:1,6; Matthew 13:8; I Corinthians 3:6-8; John 4:35-38).