“The wise man will live as long as he ought, not as long as he can.”
Sapiens vivit quantum debet, non quantum potest.
Seneca the Younger (-4–65 BC) Roman Stoic philosopher, statesman, and dramatist
Source: Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter LXX: On the proper time to slip the cable, Line 4.