Why must we believe only in Christ for salvation?

Belief in Christ alone for salvation is paramount because He is the only mediator between God and man (1 Timothy 2:5). Hebrews 9:22 emphasizes that without the shedding of blood, there is no remission of sins; thus, only Christ's death on the cross meets the requirements for atonement. Our righteousness, which is necessary for acceptance before God, is entirely derived from Christ (Philippians 3:9). Any reliance on personal merit or works leads to failure, but faith in Christ results in the assurance of salvation and eternal life.