Physiology and psychology cover, between them, the field of vital phenomena; they deal with the facts of life at large, and in particular with the facts of human life.
Bio: Guy Sajer was a French writer, author of Le soldat oublié, and a cartoonist under the pen names Dimitri, and Dimitri Lahache. He was the son of a French father and a German mother: Sajer is his mother's maiden name.