评论人物，应该充分肯定他的长处，宽容地谅解他的短处；办理事务，应该首先弄清它的害处，然后再衡量它的利处。
人体是一个复杂的谜题，而病毒只是其中的一部分。
Stay true to yourself, yet always be open to learn.
The ultimate aim of the modern movement in biology is in fact to explain all biology in terms of physics and chemistry.
荒野中最危险的不是动物或地形。而是你自己的头脑。
The Government of the United States is a definite Government, confined to specified objects. It is not like the state governments, whose powers are more general.