A sound heart is the life of the flesh: but envy the rottenness of the bones (Proverbs 14:30).

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

As a man thinks in his heart, so is he. [Proverbs 23:7]

Hope deferred makes the heart sick, but when dreams come true, there is life and joy. Proverbs 13:12 (NLT)

Hope deferred maketh the heart sick: but when the desire cometh, it is a tree of life (Proverbs 13:12).

In the way of righteousness is life; and in the pathway thereof there is no death (Proverbs 12:28).