Psalm 27:14
Wait on the Lord: be of good courage, and he shall strengthen thine heart: wait, I say, on the Lord.

Psalm 28:7
The Lord is my strength and my shield; my heart trusted in him, and I am helped: therefore my heart greatly rejoices; and with my song will I praise him.

Psalm 31:24
Be of good courage, and he shall strengthen your heart, all ye that hope in the Lord.

Psalm 73:26
My flesh and my heart faileth: but God is the strength of my heart, and my portion for ever.

Proverbs 4:23
Keep thy heart with all diligence; for out of it are the issues of life.

Proverbs 17:22
A merry heart doeth good like a medicine: but a broken spirit drieth the bones.