Meditations 9.2

It would be a man's happiest lot to depart from mankind without having had any taste of lying and hypocrisy and luxury and pride. However, to breathe out one's life when a man has had enough of these things is the next best voyage, as the saying is. Hast thou determined to abide with vice, and hast not experience yet induced thee to fly from this pestilence? For the destruction of the understanding is a pestilence, much more, indeed, than any such corruption and change of this atmosphere which surrounds us. For this corruption is a pestilence of animals so far as they are animals; but the other is a pestilence of men so far as they are men.

Marcus Aurelius, Meditations 9.2, translated by George Long

It were more graceful doubtless for a man to depart from mankind untainted with falsehood and all dissimulation and luxury and arrogance; failing that, however, the 'next best course' is to breathe out his life when his gorge has risen at these things. Or is it thy choice to throw in thy lot with vice, and does not even thy taste of it yet persuade thee to fly from the pestilence? For the corruption of the mind is a pest far worse than any such miasma and vitiation of the air which we breathe around us. The latter is a pestilence for living creatures and affects their life, the former for human beings and affects their humanity.

Marcus Aurelius, Meditations 9.2, translated by C. R. Haines