To the question, by whom, and by what, are we saved, the New Testament gives a range of answers.

1. by God, 1 Tim 4:10
2. by Christ,
3. by Christ’s blood,
4. by Christ’s resurrection
5. by Christ’s life, Eph 1:7 Rom 5:10
6. by the Holy Spirit, Tit 3:5
7. by grace, Eph 2:4-5
8. by faith,
9. by confession of the truth, Rom 10:10
10. by believing and being baptised,
11. by baptism, 1 Pet 3:21

There is, of course, nothing contradictory here.  Each item foregrounds a different aspect of salvation, some stressing the Author of salvation, others, its instrumental means.