Most often people seek in life occasions for persisting in their opinions rather than for educating themselves. Reflections on Literature and Morality
For it is not death or pain that is to be feared, but the fear of pain or death. Discourses
In the case of most pains let this remark of Epicurus aid thee, that the pain is neither intolerable nor everlasting, if thou bear in mind that it has its limits, and if thou addest nothing to it in imagination... Book VII
Do not think that what is hard for you to master is humanly impossible; but if a thing is humanly possible, consider it to be within your reach. Book VI
Quotes