Just as God told the people of Israel to sacrifice the lamb to cover their sins every year, Christ was the prophecised new covenant with men to pay for their sins, in Yeshua (Christ) our sins have been paid for, and by following Him we are forgiven of our sins, and free to follow God. Christ is the lamb, our sacrifice, who took the wrath of our sins, who was killed for the cause of transgression, but not His transgression, just like the prophet Isaiah told us He would be.
No one can come to the Father but through Christ, He is the word of God, His right hand, the lamb who saved us from our sins, the new covenant, the Messiah :3