Jesus rescues His people from sin-“Salvation is found in no one else, for there is no other name under heaven given to men by which we must be saved.” Acts 4:12
The master theme of the Christian gospel is salvation. Salvation is a picture-word of wide application that expresses the idea of rescue from jeopardy and misery into a state of safety. The gospel proclaims that the God who saved Israel from Egypt, Jonah from the fish’s belly, the psalmist from death, and the soldiers from drowning (Exod. 15:2; Jon 2:9; Ps. 116:6; Acts 27:31), saves all who trust Christ from sin and sin’s consequences.
As these earthly deliverances were wholly God’s work, and not instances of people saving themselves with God’s help, so it is with salvation from sin and death. Our salvation involves, first, Christ dying for us and, second, Christ living in us (John 15:4; 17:26; Col. 1:27) and we living in Christ, united with him in his death and risen life (Rom. 6:3-10; Col. 2:12, 20: 3:1).
We do have a part to play in this. This vital union, which is sustained by the Spirit from the divine side and by faith from our side, and which is formed in and through our new birth, presupposes covenantal union in the sense of our eternal election in Christ (Eph. 1:4-6).
Commentary from Concise Theology by J. I. Packer, part of the chapter on Salvation, pages 146, 147.