Aurelius, Meditations §aur_12_xvi: Remember that all is but opinion, and all opinion depends of the mind.

Remember that all is but opinion, and all opinion depends of the mind. Take thine opinion away, and then as a ship that hath stricken in within the arms and mouth of the harbour, a present calm; all things safe and steady: a bay, not capable of any storms and tempests: as the poet hath it.