AthanasiusLet all the house of Israel therefore know assuredly, that God hath made him both Lord and Christ, this Jesus whom ye crucified (Acts 2:36).

The Son of God indeed, being Himself the Word, is Lord of all.

We once were subject from the first to the slavery of corruption and the curse of the Law. Then by degrees we fashioned for ourselves things that were not.

We served, as says the blessed Apostle, ‘them which by nature are no Gods,’ and, ignorant of the true God, we preferred things that were not to the truth.

But afterwards, as the ancient people when oppressed in Egypt groaned, so, when we too had the Law ‘engrafted’ in us, and according to the unutterable sighings of the Spirit made our intercession, ‘O Lord our God, take possession of us.’

Then, as ‘He became for a house of refuge’ and a ‘God and defence,’ so also He became our Lord. Nor did He then begin to be our Lord, but we began to have Him for our Lord.

For upon this, God being good and Father of the Lord, in pity, and desiring to be known by all, makes His own Son put on Him a human body and become man, and be called Jesus.

This was so that, offering Himself in this body for all, He might deliver all from false worship and corruption, and might Himself become of all Lord and King.

His becoming therefore in this way Lord and King, is what Peter means when he says, ‘He hath made Him Lord,’ and ‘hath sent Christ.’

Peter is saying, that the Father in making Him man (for to be made belongs to man), did not simply make Him man, but has made Him with a with a view to His being Lord of all men, and to His hallowing all through the Anointing.

For though the Word existing in the form of God took a servant’s form, yet the assumption of the flesh did not make a servant of the Word, who was by nature Lord.

Not only did the emancipation of all humanity take place by the Word, but that very Word who was by nature Lord, and was then made man, has, by means of a servant’s form, been made Lord of all and Christ in order to hallow all by the Spirit.

[…]  Christ…being by nature Lord and King everlasting, does not become Lord more than He was at the time He is sent forth, nor then begins to be Lord and King; but what which He always and eternally is, He then is made according to the flesh.

And, having redeemed all, He becomes thereby again Lord of quick and dead. For Him henceforth do all things serve, and this is David’s meaning in the Psalm, ‘The Lord said unto my Lord, Sit Thou on My right hand, until I make Thine enemies Thy footstool.’

Athanasius of Alexandria (c.293-373): Against the Arians, 2, 15, 14.