Nothing contributes so much to tranquilize the mind as a steady purpose—a point on which the soul may fix its intellectual eye.
最能让情绪平静的是一个不变的目标——一个灵魂能够固定它的视线的地方。

——Mary Wollstonecraft Shelley, Frankenstein
——玛丽·雪莉，《弗兰肯斯坦》