Joy in the Lord lights up this life.

Proverbs 11:25-31 
25 The one who blesses others is abundantly blessed; those who help others are helped. 26 Curses on those who drive a hard bargain! Blessings on all who play fair and square! 27 The one who seeks good finds delight; the student of evil becomes evil. 28 A life devoted to things is a dead life, a stump; a God-shaped life is a flourishing tree. 29 Exploit or abuse your family, and end up with a fistful of air; common sense tells you it's a stupid way to live. 30 A good life is a fruit-bearing tree; a violent life destroys souls. 31 If good people barely make it, what's in store for the bad!