'Suffering, then, is the badge of true discipleship. The disciple is not above his master. Following Christ means passio passiva, suffering because we have to suffer. That is why Luther reckoned suffering among the marks of the true Church, and one of the memoranda drawn up in preparation for the Augsburg Confession similarly defines the Church as the community of those "who are persecuted and martyred for the gospel's sake". If we refuse to take up our cross and submit to suffering and rejection at the hands of men, we forfeit our fellowship with Christ and have ceased to follow him. But if we lose our lives in his service and carry our cross, we shall find our lives again in the fellowship of the cross with Christ. The opposite of discipleship is to be ashamed of Christ and his cross and all the offence which the cross brings in its train.'
Dietrich Bonhoeffer, The Cost of Discipleship, p.45.