Grace is free. Grace is costly. But grace is not cheap. Dietrich Bonhoeffer, the German theologian who ministered against formidable odds and bore witness to his faith at considerable cost, coined the term cheap grace. Coined during the tumultuous days of the Nazi era, in the face of a passive church that spoke of redemption but knew little of its meaning and its impact on daily life, cheap grace denotes not only corporate indifference to the demands of discipleship but also personal blindness and deafness to the call of Jesus to follow Him. "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 with out Jesus Christ, living and incarnate."
(ministrymagazine.org)