Society is like a schoolmaster who estimates boys according to their conformity to a standard that is easiest for running a school.

- Henry Sidgwick

Reason shows me that if my happiness is desirable and good, the equal happiness of any other person must be equally desirable.

- Henry Sidgwick

One has to kill a few of one’s natural selves to let the rest grow — a very painful slaughter of innocents.

- Henry Sidgwick

I do not see why the axiom of Prudence should not be questioned, when it conflicts with present inclination, on a ground similar to that on which Ego…

- Henry Sidgwick

We think so because all other people think so; Or because-or because-after all, we do think so; Or because we were told so, and think we must think…

- Henry Sidgwick