The price of freedom is eternal vigilance.

The world owes all its onward impulses to men ill at ease; the happy man inevitably confines himself within ancient limits.

"To read is to travel without moving, to live a thousand lives in one."

When we damage our woodlands, we're not losing trees—we're erasing chapters of Earth's story.

在科学问题上，一千个人的权威抵不上一个人的谦逊推理。