Wow. More things that differ from the Bible. Hebrews 5:1-4
1 For every high priest taken from among men is ordained for men in things pertaining to God, that he may offer both gifts and sacrifices for sins:
2 Who can have compassion on the ignorant, and on them that are out of the way; for that he himself also is compassed with infirmity.
3 And by reason hereof he ought, as for the people, so also for himself, to offer for sins.
4 And no man taketh this honour unto himself, but he that is called of God, as was Aaron.
How was Aaron called? I believe in Exodus Chapter 28 it is clear.
1 And take thou unto thee Aaron thy brother, and his sons with him, from among the children of Israel, that he may minister unto me in the priests office, even Aaron, Nadab and Abihu, Eleazar and Ithamar, Aarons sons...
41 And thou shalt put them upon Aaron thy brother, and his sons with him; and shalt anoint them, and consecrate them, and sanctify them, that they may minister unto me in the priests office.
Moses approached them as he was commanded to do. Jesus approached his apostles. John 15:16 is very clear on this.
16 Ye have not chosen me, but I have chosen you, and ordained you, that ye should go and bring forth fruit, and that your fruit should remain: that whatsoever ye shall ask of the Father in my name, he may give it you.
Based on these I believe God does the choosing.
As I am sure you know, there is abundant evidence in the Old Testament for a special priesthood for the one tribe of Levi. Deuteronomy 18:18 is just one among many such passages. This special priesthood could not be held by just anyone. It was restricted to those who were called. The author of Hebrews speaks of this Old Covenant priesthood in these terms in Hebrews 5:14.
Christs priesthood fulfills and supersedes the Aaronic priesthood. The letter to the Hebrews makes that clear. The entire people of God plays a priestly role in interceding for the world before God. But the Catholic Church insists that a ministerial priesthood exists in the New Covenant structure of the Church. This priesthood is based on and flows from Christs own priesthood. A properly ordained priest of the Church shares in a heightened and special way in the priesthood of Christ because he offers to God the same sacrifice that Jesus offered to God the Father. Jesus offered himself as the sacrifice to atone for sin (cf. 1 John 4:10; Heb. 9:12, 14, 26), and the priest today offers Jesus Christ back to the Father as the atonement for our sins.
Do you agree that Christ called some men to be his special representatives, such as in Matthew 4:19, Luke 6:13, and John 15:16? Do you agree that these men are called apostles and they are the human foundation of the Church (cf. Eph. 2:20)?