How do we know that Christ is the true door to salvation?

The claim of Christ as the door is substantiated by his fulfillment of Old Testament imagery and his divine authority. In Exodus 26, the design of the tabernacle's door foreshadows Christ's role—offering access to God. Jesus calls out that 'no man cometh to the Father but by me' (John 14:6), emphasizing an exclusive means for salvation. His embodiment of both humanity and divinity as portrayed in the tabernacle colors—blue, purple, and scarlet—demonstrates his kingship, deity, and sacrificial work. Thus, his self-identification as the door conveys the central tenet of Christian faith: the necessity of coming directly to Christ for reconciliation with God.