Men may block your path, but never let them obstruct you from right action, never let them destroy the feeling of charity you have toward them. You must be firm in both: steadfast in judgment and action, kind to those who do you harm. To lose your temper with them is no less a sign of weakness than one cowed into abandoning his proper course of action. In both cases, the post of duty has been deserted.

(Marcus Aurelius)