6 Christ the Lord is He who was born in the city of David. And would you know that Christ is Lord with the Father even before His Incarnation, that you may not only accept the statement by faith, but may also receive proof from the Old Testament? Go to the first book, Genesis: God says, Let us make man, not 'in My image,' but, in Our image. And after Adam was made, the sacred writer says, And God created man; in the image of God created He him. For he did not limit the dignity of the Godhead to the Father alone, but included the Son also: that it might be shown that man is not only the work of God, but also of our Lord Jesus Christ, who is Himself also Very God. This Lord, who works together with the Father, wrought with Him also in the case of Sodom, according to the Scripture: And the Lord rained upon Sodom and Gomorrha fire and brimstone from the Lord out of heaven. This Lord is He who afterwards was seen of Moses, as much as he was able to see. For the Lord is loving unto man, ever condescending to our infirmities.
Source: Catechetical Lectures (New Advent)