生命的最高表现在于：一个存在者管理自己的行为。总是受他人指导的事物在某种程度上是死物。
The highest manifestation of life consists in this: that a being governs its own actions. A thing which is always subject to the direction of another is somewhat of a dead thing.
在我看来，人类获得对天体事物的洞察所走的道路，几乎与这些事物本身一样值得惊叹。
译文：人如果没有长远的考虑，必然会埋下深重的祸根。在灾祸还未萌芽时，又有谁能理解提前预防的心思呢?
The strength of a habit is proportional to the amount of reinforcement.