He alone is my rock and my salvation, my fortress; I shall not be greatly shaken. (Ps 62:2)
Within these words king David made known the reason for his fearlessness. He had found God to be a rock, a place of sure footing and his salvation a place of security, a fortress against the onslaught of evil forces. Because David has placed his hope in God, the tempests of time might shake him but a little.