We, of course, recall that the saving power of faith resides not
in itself, but in the Almighty Saviour on whom it rests; so that,
properly speaking, it is not so much faith, as it is faith in Christ
that saves.
The whole of our salvation--past, present, and future, is dependent
upon faith. Our acceptance of Christ (John 1:12); our justification
(Rom. 5:1); our adoption (Gal. 3:26); our sanctification (Acts
26:18); our keeping (1 Pet. 1:5), indeed our whole salvation from
start to finish is dependent upon faith.