In Matthew 10:16, this signifies that what the 'false prophets' say about truth or about good should not be believed. (Arcana Coelestia 3900[5])

In Psalm 19:7, this signifies that truth will go forth from the Lord into all things. (The Inner Meaning of the Prophets and Psalms 269)

In Psalm 119:130, this signifies that people who accept the Lord in innocence are wise in their hearts. (True Christian Religion 354[3], 403[2], Apocalypse Explained 152[4])