Of all the intellectual faculties, judgment is the last to mature. A child under the age of fifteen should confine its attention either to subjects like mathematics, in which errors of judgment are impossible, or to subjects in which they are not very dangerous, like languages, natural science, history, etc.
Arthur SchopenhauerThe principle of contradiction establishes merely the agreement of concepts, but does not itself produce concepts.
Arthur SchopenhauerOn the path of actions, great heart is the chief recommendation; on that works, a great head.
Arthur SchopenhauerTo find out your real opinion of someone, judge the impression you have when you first see a letter from them.
Arthur Schopenhauer