在一個國家中，一個公民的自由就是所有人的自由。
In a state, the liberty of one citizen is the liberty of all.
The only valid data for psychology are observable behaviors.
The past is a ghost, the future a dream, and the present a fleeting moment.
The present is the past rolled up for action, and the past is the present unrolled for understanding.
The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.