 is perfect continuity. Every idea of mine comes from another idea of mine or from the ideas of some other man… [Therefore] historical thinking proceeds with respect to human phenomena—philosophy, law, society, arts and letters, language, religion—the same thing began with the natural sciences, as established in the works of Kepler and Galileo, when they proceeded to bring together empirically the simple facts of material phenomena. (Obras, VI: 167, 184)