Marcus Aurelius
Meditations 10.19
Consider what men are when they are eating, sleeping, generating, easing themselves, and so forth. Then what kind of men they are when they are imperious and arrogant, or angry and scolding from their elevated place. But a short time ago to how many they were slaves and for what things; and after a little time consider in what a condition they will be.
Marcus Aurelius, Meditations 10.19, translated by George Long
What are they like when eating, sleeping, coupling, evacuating, and the rest! What again when lording it over others, when puffed up with pride, when filled with resentment or rebuking others from a loftier plane! Yet but a moment ago they were lackeying how many and for what ends, and anon will be at their old trade.
Marcus Aurelius, Meditations 10.19, translated by C. R. Haines