The principle of contradiction establishes merely the agreement of concepts, but does not itself produce concepts.
Arthur SchopenhauerThere are, first of all, two kinds of authors: those who write for the subject's sake, and those who write for writing's sake.
Arthur SchopenhauerTo form a judgment intuitively is the privilege of few; authority and example lead the rest of the world. They see with the eyes of others, they hear with the ears of others. Therefore it is very easy to think as all the world now think; but to think as all the world will think thirty years hence is not in the power of every one.
Arthur SchopenhauerCompassion for animals is intimately associated with goodness of character, and it may be confidently asserted that he who is cruel to animals cannot be a good man.
Arthur Schopenhauer