" This is stunning. The psalmist thanks God for testing his covenant people, for refining them under the pressure of some extraordinarily difficult circumstances and for sustaining them through that experience. This is the response of perceptive, godly faith. It is not heard on the lips of those who thank God only when they escape trial or are feeling happy "

― D.A. Carson , For the Love of God (Vol. 1), 1: A Daily Companion for Discovering the Riches of God's Word