121:2 My help [cometh] from the LORD, which made {a} heaven and earth.

(a) He accuses man's ingratitude, which cannot depend on God's power.

121:3 He will not suffer thy foot to be moved: he that keepeth thee will not {b} slumber.

(b) He shows that God's providence not only watches over his Church in general, but also over every member of it.

121:6 The sun shall not {c} smite thee by day, nor the moon by night.

(c) Neither heat nor cold, nor any inconvenience will be able to destroy God's Church, even though for a time they may molest it.

121:8 The LORD shall preserve thy {d} going out and thy coming in from this time forth, and even for evermore.

(d) Whatever you attempt will have good success.