Letters 70.4

You may consider that the same thing happens to us: life has carried some men with the greatest rapidity to the harbour, the harbour they were bound to reach even if they tarried on the way, while others it has fretted and harassed. To such a life, as you are aware, one should not always cling. For mere living is not a good, but living well. Accordingly, the wise man will live as long as he ought, not as long as he can.

Seneca, Letters to Lucilius 70.4, translated by Richard Mott Gummere