I came upon a sermon by C.H. Spurgeon, called Without Money And Without Price. Spurgeon was talking about the surprising nature of free grace to us. We have it so innately in us that we must do something to get something. We often take this attitude with us with regard to God's grace. But Spurgeon makes a great point that if we think a little bit, we wouldn't be nearly suprised about God's radical grace to us in the gospel:
"Thus I have spoken upon the surprising nature of this fact (free grace). But I need to add that though I have thus shown grounds for our surprise, yet if men would think a little they might not be quite so unbelievingly amazed as they are. For, after all, the best blessings we have come to us freely. What price have you paid for your lives? And yet they are very precious.
Skin for skin, yes, all that you have would you give for them! What price do you pay for the air you breathe? What price does a man pay for the blessed sunlight? Tonight when we lay our heads down upon our pillows the poor man’s sleep shall be as sweet as the sleep of him who reclines on down. Sleep is the unbought blessing of Heaven, you cannot purchase it! It is clear, then, that some of the best blessings we possess come to us by the way of free gift."