Meditations 4.46

Always remember the saying of Heraclitus, that the death of earth is to become water, and the death of water is to become air, and the death of air is to become fire, and reversely. And think too of him who forgets whither the way leads, and that men quarrel with that with which they are most constantly in communion, the reason which governs the universe; and the things which they daily meet with seem to them strange: and consider that we ought not to act and speak as if we were asleep, for even in sleep we seem to act and speak; and that we ought not, like children who learn from their parents, simply to act and speak as we have been taught.

Marcus Aurelius, Meditations 4.46, translated by George Long

Always bear in mind what Heraclitus said: The death of earth is to pass into water, and the death of water to pass into air, and of air to pass into fire, and so back again. Bear in mind too: the wayfarer who forgets the trend of his way, and that men are at variance with the one thing with which they are in the most unbroken communion, the Reason that administers the whole Universe; and that what they encounter every day, this they deem strange; and that we must not act and speak like men asleep,—for in fact even in sleep we seem to act and speak;—and that there should be nothing of the children from parents style, that is, no mere perfunctory what our Fathers have told us.

Marcus Aurelius, Meditations 4.46, translated by C. R. Haines