Why is believing in Christ alone essential for Christians?

For Christians, believing in Christ alone is fundamental because it acknowledges His completed work on the cross as the sole basis for salvation. In John 14:6, Jesus clearly states, 'I am the way, the truth, and the life; no man comes unto the Father, but by me.' This encapsulates the exclusivity of Christ as the only mediator between God and man. Furthermore, in Acts 4:12, it affirms that there is no other name under heaven given among men, whereby we must be saved. This truth also serves to combat the self-righteousness that leads many to seek alternative paths to God through their works. Embracing salvation by grace through faith in Christ alone liberates believers from the burden of trying to earn favor with God, ensuring they rest solely on His mercy and love.