God gave Adam and Eve one commandment -- Go forth and multiply -- and one piece of advice -- don't eat the fruit, or you'll die. In order to fulfil the commandment, they had to disregard the advice. Thus the Fall, from perfection to imperfection, immortality to mortality, and unchangeability to advancement and child-bearing, was a result of obeying God's command, at the expense of paradise. Now that's a sacrifice that few can match -- giving up immortality in paradise so the rest of us can live? I can think of one other on a similar level (Hello, Jesus, nice to see you in the conversation at last), but that's it.

... that's the first time I've written a comment that exceeded the length limit. I'm sorry about that.