The study of logic is the study of the principles of correct reasoning.
逻辑学的研究是对正确推理原则的研究。
The best ideas come from frustration. The worst thing is when everything is perfect.
The wisdom of hindsight, so useful to historians and indeed to authors of memoirs, is sadly denied to practising politicians.
不要用很多词语说一点东西,而要在很少的词语中表达很多。