If our Christianity has ceased to be serious about discipleship, if we have watered down the gospel into emotional uplift which makes no costly demands and which fails to distinguish between natural and Christian existence, then we cannot help regarding the cross as an ordinary everyday calamity, as one of the trials and tribulations of life. We have then forgotten that the cross means rejection and shame as well as suffering.

Narrow Path: Daily Readings with Dietrich Bonhoeffer (ed. 1990)