A literal translation of the first line would be, "My soul finds rest in God alone." That idea is the theme of this psalm (cf. Psalm 62:5). Rather than looking to other people for encouragement and security, David looked to God alone for these needs. He did this because he had discovered that God Himself was responsible for his deliverance. He had been a rock and stronghold for the psalmist in the past. [source][source][source]