Doubt is not a pleasant condition， but certainty is an absurd one.
【释义】只有胆量却没有见识，只是鲁莽的匹夫之勇；只有见识却没有胆量，只能空谈理论而无实际成果；既有胆量又有见识，才能成就伟大的事业。
Love takes up where knowledge leaves off.
伟大的工程以你不理解的方式解决你未曾意识到的问题。
The greatest thing you'll ever learn is just to love and be loved in return.
The most profound ideas in mathematics often arise from the simplest observations.
The common question that gets asked in business is, 'why?' That's a good question, but an equally valid question is, 'why not?'
