If the entire circuit of a friend's conversation were comprised in the words "Don't" and "Do,"-it might perhaps be taken for granted that his advice was not of much value; nevertheless, it is a fact that Philosopher Jack's most intimate and valuable-if not valued-friend never said anything to him beyond these two words. Nor did he ever condescend to reason. He listened, however, with unwearied patience to reasoning, but when Jack had finished reasoning and had stated his proposed course of action, he merely said to him, "Don't," or "Do."