He who learns and learns and yet does not know what he knows, is one who plows and plows yet never sows.
Alfred KorzybskiMathematics and logic have been proved to be one; a fact from which it seems to follow that mathematics may successfully deal with non-quantitative problems in a much broader sense than was suspected to be possible.
Alfred KorzybskiIt is now no mystery that some quite influential 'philosophers' were 'mentally' ill.
Alfred Korzybski