We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.
我们不应承认自然事物的原因多于那些既真实又足以解释其现象的原因。
世界不是它看起来的样子；它是我们相信的样子。
生活中唯一的限制是你为自己设定的限制。
The world is full of people who have never, since childhood, met an open doorway with an open heart.
这个世界上充满了自童年以来从未以开放的心态迎接开放之门的人。