Only that thing is free which exists by the necessities of its own nature, and is determined in its actions by itself alone.

Only that thing is free which exists by the necessities of its own nature, and is determined in its actions by itself alone.

只有那个东西是自由的，它存在于它自己的本性的需要之中，并且是由它自己的行为所决定的。

-- Baruch Spinoza 斯宾诺莎