Why is Christ the only mediator?

Christ is the only mediator between God and men because He uniquely fulfills the requirements of both parties in God's covenant. In Exodus 19:3, Moses acts as a mediator, but he is a foreshadowing of Christ, who mediates a better covenant based on grace rather than works. The Scripture states, 'There is one God, and one mediator between God and men, the man Christ Jesus' (1 Timothy 2:5). Christ's sacrifice was necessary to validate the covenant, and through His death, He reconciles the elect to God, fulfilling the law and making them heirs to the promises of God.