How do we know Jesus is the mediator of the New Covenant?

The New Testament reveals that Jesus Christ is the mediator of the New Covenant, a truth that is foreshadowed in Jacob's dream at Bethel where he sees a ladder with angels ascending and descending. This ladder symbolizes Christ, who is the Way to the Father, as stated in John 14:6. Jesus Himself referred to this event when He spoke to Nathanael, affirming that angels would ascend and descend upon Him (John 1:51). Therefore, the fulfillment of this typology supports the understanding of Christ as the sole mediator through whose grace believers can access God.