6 “How then are all men liars? What! You are not a man, I suppose?” Answer quickly and truly. “And O that I may not be a man, that so I may not be a liar.” For see; “God looked down from heaven upon the children of men, to see if there were any that did understand, and seek after God. They are all gone out of the way, they are all together become unprofitable: there is none that does good, no not even one.” Why? Because they wished to be sons of men. But in order that he might deliver them from these iniquities, cure, heal, change, the sons of men; “he gave them power to become the sons of God.” What marvel then!
You were men, if we were the sons of men; you were all men, and were liars, for, “All men are liars.” The grace of God came to you, and “gave you power to become the sons of God.” Hear the voice of My Father saying, “I have said, You are gods; and you are all the children of the Most High.” Since then they are men, and the sons of men, if they are not the children of the Most High, they are liars, for, “all men are liars.” If they are the sons of God, if they have been redeemed by the Saviour's grace, if purchased with His precious Blood, if born again of water and of the Spirit, if predestinated to the inheritance of heaven, then indeed are they children of God.
And so thereby are gods. What then would a lie have to do with you? For Adam was a mere man, Christ, man and God; God, the Creator of all creation. Adam a mere man, the Man Christ, the Mediator with God, the Only Son of the Father, the God-man. Lo, you, O man, are far from God, and God is far above man; between them the God-man placed Himself. Acknowledge Christ, and by Him as Man ascend up to God.
Source: Sermons on Selected Lessons of the New Testament (New Advent)