O Lord, my heart is not lifted up;
my eyes are not raised too high;
I do not occupy myself with things
too great and marvelous for me.
But I have calmed and quieted my soul,
like a weaned child with its mother;
like a weaned child is my soul within me.
O Israel, hope in the Lord
from this time forth and forevermore.
A Psalm of David (Psalms 131, ESV)
A calm and quiet soul is one who hopes in the Lord.