Moral Letters to Lucilius Section 20

Cotidie enim demitur aliqua pars vitae, et tunc quoque, cum crescimus, vita decrescit. Infantiam amisimus, deinde pueritiam, deinde adulescentiam. Usque ad hesternum, quicquid transît temporis, perit; hunc ipsum, quem agimus, diem cum morte dividimus. Quemadmodum clepsydram non extremum stillicidium exhaurit, sed quicquid ante defluxit, sic ultima hora, qua esse desinimus, non sola mortem facit, sed sola consummat; tunc ad illam pervenimus, sed diu venimus.

La première enfance nous a échappé, puis le second âge, puis l’adolescence ; y compris hier, tout le temps
écoulé n’est plus, et ce jour même que nous vivons nous le disputons pied à pied au néant. Comme ce n’est pas la dernière goutte d’eau qui vide la clepsydre, mais tout ce qui a fui précédemment, ainsi l’heure dernière, où nous cessons d’être, ne fait pas la mort à elle seule, mais seule elle la consomme. Alors nous arrivons au terme, mais dès longtemps nous y marchions.

For every day a little of our life is taken from us; even when we are growing, our life is on the wane. We lose our childhood, then our boyhood, and then our youth. Counting even yesterday, all past time is lost time; the very day which we are now spending is shared between ourselves and death. It is not the last drop that empties the water-clock, but all that which previously has flowed out; similarly, the final hour when we cease to exist does not of itself bring death; it merely of itself completes the death-process. We reach death at that moment, but we have been a long time on the way.