Why does one man "accept" God's "offer" of free grace and another "reject" His "offer?"
There must be some difference in the two people if they choose differently by their own free will, according to your logic. Is the one who chooses well more pious, more intelligent, more devout, better read, more spiritual, more jovial, cleaner, quicker-witted, richer, more connected, right-handed???
No. Like Lazarus, every man is fallen and dead in sin, incapable of reviving in any way, unless and until God's regenerating hand rebirths his cold, stone heart.
Salvation is entirely God's call. Our job is to fall to our knees in gratitude for His gracious gift of Christ's redemptive sacrifice, and to live a life that glorifies His name.
Exactly. See 1 John 2:2