
“If you are wise, mingle these two elements: do not hope without despair, or despair without hope.”
Si sapis, alterum alteri misce: nec speraveris sine desperatione nec desperaveris sine spe.
Alternate translation: Hope not without despair, despair not without hope. (translated by Zachariah Rush).
Source: Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter CIV: On Care of Health and Peace of Mind, Line 12