Instead of following Christ, let the Christian enjoy the consolations of His grace! That is what we mean by ‘cheap grace’, the grace which amounts to the justification of sin without the justification of the repentant sinner who departs from sin and from whom sin departs. Cheap grave is not the kind of forgiveness of sin which frees us from the toils of sin. Cheap grace is the grace which we bestow upon ourselves…
Cheap grace is grace without discipleship, grace without the cross, grace without Jesus Christ, living and incarnate.
-- Dietrich Bonhoeffer in “The Cost of Discipleship”