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It is no use saying, 'We are doing our best.' You have got to succeed in doing what is necessary.

The only limit to our understanding of the universe is our imagination.

聰明的投資者是現實主義者，他們向樂觀主義者出售，從悲觀主義者那里購買。

最好的建筑既是謙遜的，又是英雄的。