I have a different way of putting it that works better for me:
Give all you got. God requires it. It will not be sufficient to save you. Christ's grace is.
You will fail to give all you have. So but try and want and His grace covers you for that also.
"Saved After All We Can Do" can sound like our focus is to save ourselves, which is fine, but really, if we only do things to save ourselves, it means we have no charity, and that's not going to work. When we serve, we mainly think about giving to improve someone else's station. That's one reason I like my way of putting it better.