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The habit of reading is the only enjoyment in which there is no alloy; it lasts when all other pleasures fade.

I have always been alone, but I have never been lonely.

沒有責任感的效率不過是魯莽的速度。

為了避免批評，什么都不做，什么都不說，什么都不是。

幸福是微小瞬間的積累。

Modern forestry must balance three axes: ecology, economy and ethics.

物理學的美在于它能夠用簡單的定律解釋復雜的事物。