Grace creates debt?

I realize that it has been a while since my last post and for that I am truly sorry. Work and the holidays have snuck up on me and blogging has fallen to the wayside. Regardless, the jouney continues. Following is a nugget that I received from gracedagain.com.


"The effort to repay God in the ordinary way we pay creditors would nullify grace and turn it into a business transaction. If we see acts of obedience as installment payments, we make grace into a mortgage. Let us not say that grace creates debt; let us say that grace pays debts."
John Piper, Future Grace