Costly

"Such grace is costly because it calls us to follow, and it is grace because it calls us to follow Jesus Christ. It is costly because it costs a man his life, and it is grace because it gives a man the only true life. It is costly because it condemns sin, and grace because it justifies the sinner. Above all, it is costly because it cost God the life of his Son: "ye were bought at a price," and what has cost God much cannot be cheap for us. Above all, it is grace because God did not reckon his Son too dear a price to pay for our life, but delivered him up for us. Costly grace is the Incarnation of God."

"In the depth of his misery, Luther had grasped by faith the free and unconditional forgiveness of all his sins. That experience taught him that this grace had cost him his very life, and must continue to cost him the same price day by day."

-The Cost of Discipleship, Dietrich Bonhoeffer