This eliminates any limitations we might think we have in life. In Christ, we have been unlimited resources. Whatever God commissions to do, we can do, because God's resources are available to us. Batteries go dead. We get tired.
Machines wear out.
So we conclude that we are no different. Our attitude predicts our failure. And I cannot permanently change my exercise habits. No doubt they've tried in the past and didn't have the strength to keep it going. They share the common fear that they won't be able to stick with it.