What a fool old Adam was. Had everything his own way; had succeeded in gaining the love of the best looking girl in the neighborhood, but yet unsatisfied with his conquest he had to eat a miserable little apple.

The moment you stop trying is the moment you stop learning.

释义：贫穷和低贱本身并不是耻辱，而通过谄媚、乞求他人来获取利益才是真正的耻辱。

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

The value and utility of any experiment are determined by the fitness of the material to the purpose for which it is used.

采石场经理需要工程师的精确和诗人的远见。

The future belongs to those who prepare for it today.

O homem só é verdadeiramente livre quando reconhece a sua dependência dos outros.