We are such weaklings and suffering “martyrs” when even one leg hurts or a small sore swells that we can fill heaven and earth with cries and howls, grumbling and cursing. We do not see what a tiny evil such a small thing is, compared to the countless blessings that God provides. Snorers that we are, God lets us experience these minor troubles so that we may be awakened from our deep sleep and be driven by knowledge and realization to consider what would happen if the great and countless blessings present to us disappeared because God’s favor turned away from us.

Martin Luther, Commentary on Psalm 118