“Amen, amen, I say to you, unless you eat the flesh of the Son of Man and drink his blood, you do not have life within you” (Jn 6:53)
John 14:6
Jesus answered, “I am the way and the truth and the life. No one comes to the Father except through me.”
A priest cannot offer salvation whether by ritual or not.
Ephesians 2:8-9
-8 For it is by grace you have been saved, through faith—and this is not from yourselves, it is the gift of God— 9 not by works, so that no one can boast.