Servitude.

All life is servitude. And so a man must become reconciled to his lot, must complain of it as little as possible, and must lay hold of whatever good it may have; no state is so bitter that a calm mind cannot find in its some consolation.  Apply reason to difficulties; it is possible to soften what is hard, to widen what is narrow, and burdens will press less heavily upon those who bear them skillfully.

Seneca