By definition, a priest is one who makes a sacrificial offering to God on behalf of the people. Jesus is our Great High-priest who makes the offering of his very self for the life and for the salvation of the world. Here’s Part 1 of a study of Jesus’ Great High-priestly Prayer in John 17.
How many times with your own hand have you held out to me your Body and your Blood, and I, though a miserable sinner, have received this Sacrament, and have tasted your love, so ineffable, so heavenly. Glory to you, O God, from age to age!