The way the physics works is you will find some laws of motion in mathematical form, you put in the initial conditions of whatever, you solve the equations, and the answer that comes, you have no choice.

在物理问题中,你可以用数学方法得到运动定律,你代入初始条件,然后解方程,获得答案,你别无选择

耶鲁公开课 - 基础物理课程节选

That's how he often writes about human behavior, that we obey the same laws of physical attraction as do any other bodies that we might choose to describe. They describe how bodies in motion always and necessarily behave, these laws of nature.

这是他经常说的人类行为，我们遵守同样的物质吸引的法则,其他人也一样,他们描述运动中的身体,经常而且肯定会，体现出自然法。

耶鲁公开课 - 政治哲学导论课程节选