my grace comes from you and your perfect supernatural intervention

"All the natural movements of the soul are controlled by laws analogous to those of physical gravity. Grace is the only exception." (Gravity and Grace, Weil 1)

It is good to define the act of the infinite reaching into the finite as grace. We as created beings cannot offer Grace back to God. Does grace implicate authority?

"We must always expect things to happen in conformity with the laws of gravity unless there is supernatural intervention" (Gravity and Grace, Weil 1)

Does this make Grace supernatural intervention?

Response from Steve Laughlin:

I don't think God is looking for grace from us, but rather that we extend grace to one another. If God's gift is indeed a gift, then repayment is inappropriate, and indeed impossible.

How would we show unmerited favor to God anyway? God has infinite merit - any favor we show Him would be deserved, which is the opposite of grace.