Bonhoeffer said, “Cheap grace is grace without discipleship, grace without the cross, grace without Jesus Christ, living and incarnate. Costly grace is the treasure hidden in the field; for the sake of it a man will go and sell all that he has. 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: ‘You 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.”
Discipleship is not a heavy burden that we must bear by our own strength–it is the light yoke of a death that leads to true life. Whatever investment I have made in the lives of others has produced a return completely out of proportion to what I put in.
Discipleship is the process of raising up spiritual sons and daughters so they are empowered to live a fruitful life by following Jesus and reproducing their own spiritual sons and daughters.