children sometimes say things that are wise, profound, or insightful
—After hearing news about wars around the world, my young niece said that people should learn how to love each other. Out of the mouths of babes.
Not only was David a warrior and king of Isreal, he was also a poet, writing with great passion in the book of Psalms. In Psalm 8, he writes that even small children honor God with what they say:
O Lord, our Lord,
how magnificent is your reputation throughout the earth!
You reveal your majesty in the heavens above!
From the mouths of children and nursing babies [Out of the mouth of babes and sucklings—KJV]
you have ordained praise on account of your adversaries,
so that you might put an end to the vindictive enemy. (Psalm 8:1-2)