The life of the gentle priest and great scientist, Johann Mendel, bore the marks throughout its span of its humble and difficult beginning. Born of a Moravian peasant family, the brilliant Johann lived under the constant threat of poverty to which all people of his class were subject in the troubled nineteenth century. His privations as a student, his gentle determination to learn and to serve, his years when he became Father Gregor, a bewildered monk, his final clerical success, and the prolonged refusal of the world to recognize, during his life, the contribution he had made are vividly portrayed in this biography of Johann, the man, Gregor, the monk, and Mendel, the scientific visionary. Much interesting detail regarding his experiments with mutations and heredity are offered here, as well as an illuminating discussion of the relation his work had to the work of such men as Darwin and later scientists. A story which wins interest, not through melodrama, but through the appreciation of the profound simplicity of this singularly brilliant, profoundly humble scientist. A moving testament to the compatibility of the search for physical and metaphysical truth.