"A Very Present Help In Trouble"
Context: This psalm is a statement of the confidence the Jews had in God to protect and help them: He was their refuge in time of tribulation and a source of strength; He was their help in times of trouble. God being what He is, the Jews had no fear, even though terrible convulsions might rend the earth and hurl the mountains into the sea. The waters might roar and the mountains tremble, but the Jews' faith in God would remain strong. The Lord of Hosts was with them, and the God of Jacob was their refuge. No one is exactly sure of the meaning of "Selah," that occurs frequently in the Psalms; perhaps it means "So be it," or "Notice."
God is our refuge and strength, a very present help in trouble.Therefore will not we fear, though the earth be removed, and though the mountains be carried into the midst of the sea;Though the waters thereof roar and be troubled, though the mountains shake with the swelling thereof. Selah.