How do we know that Jesus is the only mediator?

We know that Jesus is the only mediator through the explicit teachings of Scripture, particularly in 1 Timothy 2:5, which states there is one God and one mediator between God and men, the man Christ Jesus. This mediatorial role is unique to Him, as He fully represents both God and humanity. No one else can fulfill this role because, while many may serve as spiritual leaders or guides, they cannot mediate between the holy God and sinful humanity as Jesus does through His sacrificial death and resurrection. Therefore, any claim to additional mediators contradicts the clear truth of Scripture regarding Christ's unique position.