Psalm 57, 108, 112

My heart is steadfast, O God,
   my heart is steadfast.
I will sing and make melody.
⁸   Awake, my soul! Ps. 57: 7, 8

My heart is steadfast, O God, my heart is steadfast;^*
   I will sing and make melody.
   Awake, my soul! ^*Ps. 108: 1

He will have no fear of bad news;
his heart is steadfast,
trusting in the Lord. Ps. 112: 7

In one scene from The Passion of the Christ, Jesus is shown quoting these words: My heart is steadfast O God. I forget so much - especially when it comes to movies. But these words of Jesus when he was in the greatest torment and physical abuse of his life have haunted me: My heart is steadfast O God. 

When things are going badly for us - not just badly, horribly - and our souls feel dead, we are called to sing, calling on God to wake us up from the deadness we feel in the depths of who we are.

When I read these psalms, I read them as a commentary on the thoughts of Jesus facing the cross.