In Exodus 7:19, 8:5, Numbers 21:15, Psalms 46:4, 78:16, 124:4, Isaiah 30:25, and Luke 6:48, this signifies truths of faith. (Arcana Coelestia 795[3])

In Joel 3:18, this signifies the singulars of the Lord's celestial kingdom, and also of the Word. (Apocalypse Explained 376[5])

A 'stream' signifies aspects of knowledge or intelligence.

(References: Arcana Coelestia 6015)