Books, like friends, should be few and well chosen. Like friends, too, we should return to them again and again for, like true friends, they will never fail us - never cease to instruct - never cloy. ↗
Justice to my readers compels me to admit that I write because I have nothing to do; justice to myself induces me to add that I will cease to write the moment I have nothing to say. ↗
Abatement in the hostility of one's enemies must never be thought to signify they have been won over. It only means that one has ceased to constitute a threat. ↗
A man ceases to be a beginner in any given science and becomes a master in that science when he has learned that he is going to be a beginner all his life. ↗