The precepts of the Lord give joy to the heart.

The law of the LORD is perfect,
refreshing the soul;
the decree of the LORD is trustworthy,
giving wisdom to the simple.
The precepts of the LORD are right,
rejoicing the heart.
The command of the LORD is clear,
enlightening the eye.
The fear of the LORD is pure,
enduring forever;
the ordinances of the LORD are true,
all of them just.
By them your servant is instructed;
obeying them brings much reward.
Though your servant is careful of them,
very diligent in keeping them,
Yet who can detect failings?
Cleanse me from my unknown faults!
From wanton sin especially, restrain your servant;
let it not rule over me.
Then shall I be blameless and innocent
of serious sin.
Let the words of my mouth meet with your favor,
keep the thoughts of my heart before you, LORD, my rock and my redeemer.
from Psalm 19