In every pain let this thought be present, that there is no dishonor in it, nor does it make the governing intelligence worse. Indeed, in the case of most pains, let this remark of Epicurus aid thee, that pain is neither intolerable nor everlasting - if thou bearest in mind that it has its limits, and if thou addest nothing to it in imagination. Pain is either an evil to the body (then let the body say what it thinks of it!)-or to the soul. But it is in the power of the soul to maintain its own serenity and tranquility, and not to think that pain is an evil. . . . It will suffice thee to remember as concerning pain . . . that the mind may, by stopping all manner of commerce and sympathy with the body, still retain its own tranquility.