Athanasius of Alexandria

Yet the love of God for humanity is such that by grace He becomes Father of those in relation to whom he had previously only been Maker. He becomes their Father when created beings receive ‘into their hearts the Spirit of the Son crying out, ‘Abba, Father’ [Gal 4.6]., as the apostle says. These are the ones who, by receiving the Word, receive authority from him ‘to become the children of God’ (John 1.12). Being creatures by nature, they would not become ‘sons’ except by receiving the Spirit of the natural and true Son. So it was in order to bring this about and to make humanity receptive of divinity that ‘The Word became flesh’ (John 1.14)… Accordingly, the Father calls ‘sons’ those in whom He sees His own Son and He says, ‘I begot’ since ‘begetting’ signifies ‘sons’ while ‘making’ is indicative of the works. Therefore we are not begotten first but made [created], for it is written, ‘Let us make humanity’ [Gen 1.26]. But when we later receive the grace of The Spirit, we are henceforth said to also be begotten. - "Against the Arians, 2.59"

Knowing once more how the will of man could sway to either side, in anticipation God secured the grace given them by a command and by the place where he put them. For he brought them into his own garden and gave them a law so that, if they kept the grace and remained good, they might still keep the life in paradise without sorrow or pain or care, besides having the promise of incorruption in heaven. But if they transgressed and turned back and became evil, they might know that they were incurring that corruption in death that was theirs by nature, no longer to live in paradise but cast out of it from that time forth to die and abide in death and corruption.

By means of righteousness we come into God’s presence, as Moses did when he entered the thick cloud where God was. On the other hand, by the practice of evil a person leaves the presence of the Lord. For example, Cain, when he killed his brother, left the Lord’s presence as far as his will was concerned.

Thus the sacrifice was not for the sake of Isaac but for that of Abraham, who was tested by being called upon to make this offering. And of course, God accepted his intentions, but he prevented him from slaying Isaac. The death of Isaac would not buy freedom for the world. No, that could be accomplished only by the death of our Savior, by whose stripes we are all healed.