grace: cheap and costly

"Cheap grace is the preaching of forgiveness without requiring repentance, baptism without church discipline, Communion without confession, absolution without personal confession. Cheap grace is grace without discipleship, grace without the cross, grace without Jesus Christ, living and incarnate...

Costly grace is the gospel which must be sought again and again, the gift which must be asked for, the door at which a man must knock...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." ~Dietrich Bonhoeffer