What does the Bible say about salvation by Christ?

The Bible asserts that salvation is by Christ alone, as seen in Hebrews 10:10, where it states that we are sanctified through the offering of the body of Jesus Christ once for all. This doctrine emphasizes that His singular sacrifice is sufficient to take away sins permanently, contrasting with the repetitive sacrifices of the priests in the Old Testament, which could never fully atone for sin. Through Christ's offering, believers are set apart and perfected forever, highlighting that redemption is accomplished through His actions, not ours.