Is this different from sin? I always thought that the Father sent the Son because He cared enough about something to make the effort. But, you said that God was indifferent to sin.
"God became man so that men might become gods", in other words, so that we might attain theosis which is our created purpose.
I must admit that I am completely unfamiliar with this idea. We are to become gods? Is there any Biblical support for us becoming gods?
God is simply helping us become restored to our original state, the way we were created. Those who turn to God stand a chance. Those who don't -- well, they will never be restored. He is doing that not because He needs us, or because he is "lonely" (God is one but He is not alone), or because we "earned it," but simply because He loves us. Sin does not affect Him, you can be sure of that.
"From the power of death over us.
Is this different from sin? I always thought that the Father sent the Son because He cared enough about something to make the effort. But, you said that God was indifferent to sin."
Quite different. Death, both physical and spiritual, entered the world along with the sin of Adam because on account of that sin, we were, until the Incarnation, utterly incapable of fulfilling our created purpose. Death had dominion over us. We could not become "like gods", attain theosis, and after physical death were separated from God and remained in the place of the dead. My tag line says it all. Its from the Pascal Sermon of +John Chrysostom. And of course God cared enough about His creation to make the effort. God loves us.
"I must admit that I am completely unfamiliar with this idea. We are to become gods? Is there any Biblical support for us becoming gods?"
Absolutely! Read "On the Incarnation" by +Athanasius the Great. The link is below and the work is replete with scripture. He wrote it about 318, before even the 1st Ecumenical Council.
"http://www.ccel.org/fathers2/NPNF2-04/Npnf2-04-16.htm"