"Socialism and rationalism are to this day the touchstones of humanity, the rocks which lie in the course of revolution and science. Groups of swimmers, driven by reflection or the waves of circumstance against these rocks, break up at once into two camps, which, under different disguises, remain the same throughout all history, and may be distinguished either in a great political party or in a group of a dozen young men. One represents logic; the other, history: one stands for dialectics; the other for evolution. Truth is the main object of the former, and feasibility of the latter."