During the Reformation, Martin Luther surrounded himself with key reformers who would help shape and form the teaching and practice of the Lutheran Church, and perpetuate his legacy after his death. Nikolaus Amsdorf was one of these key reformers without whose assistance and efforts the Reformation would not have succeeded. Amsdorf lived to an unusually old age, and even in his 80s he was an unflagging and energetic servant of the Church. After Luther's death, Amsdorf, Luther's lifelong friend and supporter, was key to the preservation of the Reformation in the face of great pressures brought to bear on him. He never failed to proclaim Christ.