It's not an even exchange

Mark Horne writes with wisdom about God's grace:

It seems almost human nature to think that we can find something to do for God that will make Him do us favors. If we live more virtuously, or cut down on a vice or two, then God will have to reward us.

But the problem with this notion is not only that it doesn't take sin seriously but also that it doesn't really comport with the idea of God at all.

As Mark points out, the notion is also pagan.