Straight from a Henri Nouwen devotional:
“The man who never prays… is like the child with asthma; because he is short of breath, the whole world shrivels up before him. He creeps in a corner gasping for air, and is virtually in agony.
“But the man who prays opens himself to God and can freely breathe again. He stands upright, stretches out his hands and comes out of his corner, free to boldly stride through the world because he can move about without fear.”