Seneca

“ I am often filled with wonder when I see some men demanding the time of others and those from whom they ask it most indulgent. Both of them fix their eyes on the object of the request for time, neither of them on the time itself; just as if what is asked were nothing, what is given, nothing. Men trifle with the most precious thing in the world; but they are blind to it because it is an incorporeal thing, because it does not come beneath the sight of the eyes, and for this reason it is counted a very cheap thing—nay, of almost no value at all. ”

“ But no one sets a value on time; all use it lavishly as if it cost nothing. But see how these same people clasp the knees of physicians if they fall ill and the danger of death draws nearer, see how ready they are, if threatened with capital punishment, to spend all their possessions in order to live! So great is the inconsistency of their feelings. ”

“ Yet no one will bring back the years, no one will bestow you once more on yourself. Life will follow the path it started upon, and will neither reverse nor check its course; it will make no noise, it will not remind you of its swiftness. ”