On today's episode, a listener writes in and asks Dave, "Why do Christians sing praise and worship songs?"• When You Sing, You Obey.• When You Sing, You Dig Deep Roots in the Word.• When You Sing, You Build up Others.• When You Sing, You Make War.• When You Sing, You Are Spiritually Strengthened for Trial.• When You Sing, You Walk a God-Designed Pathway to Joy.• When You Sing, You Glorify God.