作家最伟大的工具不是笔，而是引导它的心与思想。

解释：大多数花类药材都有升散的作用，而旋覆花却有降气的作用，说明药材特性的多样性。

I'm not afraid to fail, I'm afraid not to try.

The present state of the system of nature is evidently a consequence of what it was in the preceding moment, and if we conceive of an intelligence which at a given instant comprehends all the relations of the entities of this universe, it could state the respective positions, motions, and general effects of all these entities at any time in the past or future.

The next generation won't ask what we said—they'll ask what we did.

The past is not dead. It is not even past.

如果你试图取得成就，就会遇到障碍。我遇到过；每个人都遇到过。但障碍不一定会阻止你。如果你遇到一堵墙，不要转身放弃。想办法爬过去，穿过它，或者绕过它。