"If you want God's favor, there are two ways to relate to him. You can relate to him as an heir, or you can relate to him as a slave. The difference is that a slave tries to become acceptable to his master by presenting him valuable service; but the heir trusts that the inheritance of his father is his by virtue of a will that was drawn up without his earning it at all."
"A slave is never quite sure he has done enough to please his master and win an honorable standing in the house. A son rests in the standing he has by virtue of his birth and the covenant his father made in his will to bless his children."
- John Piper