Letter 5 — The Philosopher’s Mean (§8)

“I am not surprised that they proceed in this way; each alike belongs to a mind that is in suspense, a mind that is fretted by looking forward to the future. But the chief cause of both these ills is that we do not adapt ourselves to the present, but send our thoughts a long way ahead. And so foresight, the noblest blessing of the human race, becomes perverted.”