Charles H. Spurgeon on Psalms 57:1

Be merciful unto me, O God, be merciful unto me. Urgent need suggests the repetition of the cry, for thus intense urgency of desire is expressed. If `he gives twice who gives quickly, 'so he who would receive quickly must ask twice. For mercy the psalmist pleads at first, and he feels he cannot improve upon his plea, and therefore returns to it. God is the God of mercy, and the Father of mercies, it is most fit therefore that in distress he should seek mercy from him in whom it dwells. For my soul trusteth in thee. Faith urges her suit right well. How can the Lord be unmerciful to a trustful soul? Our faith does not deserve mercy, but it always wins it from the sovereign grace of God when it is sincere, as in this case where the soul of the man believed. "With the heart man believeth unto righteousness." Yea, in the shadow of thy wings will I make my refuge. Not in the cave alone would he hide, but in the cleft of the Rock of ages. As the little birds find ample shelter beneath the parental wing, even so would the fugitive place himself beneath the secure protection of the divine power. The emblem is delightfully familiar and suggestive. May we all experimentally know its meaning. When we cannot see the sunshine of God's face, it is blessed to cower down beneath the shadow of his wings. Until these calamities be overpast. Evil will pass away, and the eternal wings will abide over us till then. Blessed be God, our calamities are matters of time, but our safety is a matter of eternity. When we are under the divine shadow, the passing over of trouble cannot harm us; the hawk flies across the sky, but this is no evil to the chicks when they are safely nestling beneath the hen.