might defy this law till history ended, but its necessity would be the same for man as for space or time or force, and without it the historian would always remain a child in science.
Any schoolboy could see that man as a force must be measured by motion, from a fixed point. Psychology helped here by suggesting a unit,—the point of history when man held the highest idea of himself as a unit in a unified universe. Eight or ten years of study had led Adams to think he might use the century 1150-1250, expressed in Amiens Cathedral and the works of Thomas Aquinas, as the unit from which he might measure motion down to his own time, without assuming anything as true or untrue, except relation. The movement might be studied at once in philosophy and mechanics. Setting himself to the task, he began a volume which he mentally knew as "Mont Saint Michel and Chartres: a study of thirteenth-century unity." From that point he proposed to fix a position for himself, which he could label: "The Education of Henry Adams: a study of twentieth-century multiplicity." With the help of these two points of relation, he hoped to project his lines forward and backward indefinitely, subject to correction from anyone who should know better. Thereupon, he sailed for home.
