自然界的主要力量大多对我们不可见。

科技领域的多样性不仅仅是锦上添花——它对创造更好的产品至关重要。

Conflict is the gadfly of thought. It stirs us to observation and memory. It instigates to invention. It shocks us out of sheeplike passivity, and sets us at noting and contriving.

The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.