Psalm 43 says,

Vindicate me, O God, And plead my cause against an ungodly nation; Oh, deliver me from the deceitful and unjust man! For You are the God of my strength; Why do You cast me off? Why do I go mourning because of the oppression of the enemy? Oh, send out Your light and Your truth! Let them lead me; Let them bring me to Your holy hill And to Your tabernacle. Then I will go to the altar of God, To God my exceeding joy; And on the harp I will praise You, O God, my God. Why are you cast down, O my soul? And why are you disquieted within me?

Hope in God; For I shall yet praise Him, The help of my countenance and my God.

The psalmist looks to God to be his defender against ungodliness and evil. He knows that God is his defender and his strength and yet he challenges God, asking Him why God has cast him off and why he must mourn. Yet God remains silent. It is the psalmist that brings himself to the realization that while there is evil in the world, God is not to blame. Rather, God is the one to whom we go for light and truth. While we are in the midst of darkness and despair, there is a holy hill to which we can go and his presence in which we may abide. God invites us to turn away from our own anger, fears and doubts toward His light, peace and presence. God is our joy. It is up to us to decide to praise Him in the darkest hours and press onward as people of light.