We are all bound by the laws of our own natures.
我们都受到自己天性的束缚。
Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.
 释义:身体没有受到饥饿和寒冷的痛苦,这是上天不曾亏待我;若是我的学问无所进步,我有何颜面去面对上天呢?