I have set. Peter interprets vs. 8–10 and Paul v. 10 as prophetic of the resurrection of Christ in the flesh (Acts 2:25–31; 13:35–37). As such, this part of the psalm is definitely Messianic. In Christ’s deliverance from the tomb and in His resurrection the full meaning of these verses became clear. On the resurrection of Jesus, see Luke 24:39; John 20:27.
Always before me. In David’s eyes, God was no mere abstraction, but a Person actually at his side. Enoch walked with God (Gen. 5:22). Moses kept a vision of God before him. We need a consciousness of the constant presence of God. Not only will a sense of God’s presence be a deterrent to sinning, but it will gladden the heart, brighten the life, and give meaning to circumstances.
At my right hand. The phrase, applied both to man and to God, is especially common in Psalms. The position is one of honor and dignity, defense and protection. Here the latter is intended.
Shall not be moved. See Ps. 15:5. The Christian may well rejoice because he is standing on the Rock of Ages.