Thou art my hiding place; thou shalt preserve me from trouble; thou shalt compass me about with songs of deliverance. Selah.
Thou ... trouble. There is a play on similar sounds in the Hebrew mitsar (H6862), titsreeniy (H5341), implying that trouble ceases to be trouble when God is our preserver.
Shalt compass ... A whole crowd of troubles encompased him when through his sin God was estranged from him; but now, instead, a circle of joyous songs encompass him through the favour of God. The Hebrew for songs (ramee) is the same as is translated "shout for joy," Psalms 32:11 (Job 38:7; 2 Samuel 22:1).