Of the Ethical application I have already spoken. The highest good was the virtuous life. Virtue alone is happiness, and vice is unhappiness. Carrying this theory to its extreme, the Stoic said that there could be no gradations between virtue and vice, though of course each has its special manifestations. Moreover, nothing is good but virtue, and nothing but vice is bad. Those outside things which are commonly called good or bad, such as health and sickness, wealth and poverty, pleasure and pain, are to him indifferent adiofora. All these things are merely the sphere in which virtue may act. The ideal Wise Man is sufficient unto himself in all things, autarkhs and knowing these truths, he will be happy even when stretched upon…
Marcus Aurelius, Meditations, pg. 6, loc. 589. Kindle Edition