Why is faith necessary for salvation according to the Bible?

According to Hebrews 11:6, without faith, it is impossible to please God. Faith is the divinely granted ability to believe in the promises of God and trust in the work of Jesus Christ for salvation. Faith is not merely an intellectual assent but a reliance on Christ's finished work. It is by grace we are saved through faith, a gift from God that allows believers to be justified entirely based on Christ's righteousness, not our own works (Ephesians 2:8-9). Therefore, faith is critical as it is the key to accepting God's grace and the assurance of eternal life.