Jesus said "I am the way, the truth and the life. No man comes to the Father except by Me. Jn 14:6
So then, no one can get to heaven except through Jesus.
Peter said to Jesus "To whom shall we go? You have the words of eternal life". Jn 6:68
Peter, one of Jesus most close followers, after much time being with Him, recognized that only Jesus had the words of eternal life.
For by grace are you saved through faith and that not of yourselves it is the gift of God.
Faith comes by hearing and hearing by the Word of God.