
“Men do not care how nobly they live, but only how long, although it is within the reach of every man to live nobly, but within no man's power to live long.”
Nemo quam bene vivat sed quam diu curat, cum omnibus possit contingere ut bene vivant, ut diu nulli.
Source: Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter XXII: On the futility of half-way measures, Line 17.