A Song of Ascents.
v.1-2 The psalmist lifts up his eye to the hills (Mt. Zion) and declares that his help (salvation) comes from the Lord (who made heaven and earth).
v.3-4 The Lord is our keeper and the protector of the church. Our keeper does not slumber but is awake and ready to keep us.
v.5-6 He will keep as close to us as a shadow to the body. He is the shade that refreshes us.
v.7-8 The Lord will keep his people from all evil, from now to eternity.
He that made heaven and earth (all very excellent) is the powerful and sovereign Lord of the hosts and is able to save his people.