Apostol § 311ctr

Brethren, no man takes this honor unto himself, but he that is called by God, as was Aaron. So also Christ did not glorify Himself to become High Priest, but He that said unto Him: ‘Thou art My Son, today have I begotten Thee.” As He saith also in another place: “Thou art a priest for ever after the order of Melchizedek” ...