Jesus must therefore make it clear beyond all doubt that the “must” of suffering applies to his disciples no less than to himself. Just as Christ is Christ only in virtue of his suffering and rejection, so the disciple is a disciple only in so far as he shares his Lord’s suffering and rejection and crucifixion Discipleship means adherence to the person of Jesus, and therefore submission to the law of Christ which is the law of the cross.
To endure the cross is not a tragedy; it is the suffering which is the fruit of an exclusive allegiance to Jesus Christ. When it comes, it is not an accident, but a necessity. It is not the sort of suffering which is inseparable from this mortal life, but the suffering which is an essential part of the specifically Christian life. It is not suffering per se but suffering-and-rejection, and not rejection for any cause or conviction of our own, but rejection for the sake of Christ. 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. The Psalmist was lamenting that he was despised and rejected of men, and that is an essential quality of the suffering of the cross. But this notion has ceased to be intelligible to a Christianity which can no longer see any difference between an ordinary human life and a life committed to Christ. The cross means sharing the suffering of Christ to the last and to the fullest. Only a man thus totally committed in discipleship can experience the meaning of the cross. The cross is there, right from the beginning, he has only got to pick it up: there is no need for him to go out and look for a cross for himself, no need for him deliberately to run after suffering. Jesus says that every Christian has his own cross waiting for him, a cross destined and appointed by God. Each must endure his allotted share of suffering and rejection. But each has a different share: some God deems worthy of the highest form of suffering, and gives them the grace of martyrdom, while others he does not allow to be tempted above that they are able to bear. But it is the one and the same cross in every case.
The cross is laid on every Christian. The first Christ-suffering which every man must experience is the call to abandon the attachments of this world. It is that dying of the old man which is the result of his encounter with Christ. As we embark upon discipleship we surrender ourselves to Christ in union with his death-we give over our lives to death. Thus it begins; the cross is not the terrible end to an otherwise god-fearing and happy life, but it meets us at the beginning of our communion with Christ. When Christ calls a man, he bids him come and die. It may be a death like that of the first disciples who had to leave home and work to follow him, or it may be a death like Luther’s, who had to leave the monastery and go out into the world. But it is the same death every time-death in Jesus Christ, the death of the old man at his call. Jesus’ summons to the rich young man was calling him to die, because only the man who is dead to his own will can follow Christ. In fact every command of Jesus is a call to die, with all our affections and lusts. But we do not want to die, and therefore Jesus Christ and his call are necessarily our death as well as our life. The call to discipleship, the baptism in the name of Jesus Christ means both death and life.Dietrich Bonhoeffer, The Cost of Discipleship (New York: Collier Books, 1960), 96, 98-99.