让女性成为理性的生物和自由的公民，她们很快就会成为好妻子和好母亲；也就是说，如果男性不忽视丈夫和父亲的职责。

在数学的领域里，想象力和逻辑完美和谐地共舞。

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.

Hope is not a feeling; it is a doable thing.

没有什么比不快乐更有趣了。