I do not regard a man as poor, if the little [time] which remains is enough for him. I advise you, however, to keep what is really yours; and you cannot begin too early. For, as our ancestors believed, it is too late to spare when you reach the dregs of the cask. Of that which remains at the bottom, the amount is slight, and the quality is vile.
Seneca’s Letters from a Stoic
The largest portion of our life passes while we are doing ill, a goodly share while we are doing nothing, and the whole while we are doing that which is not to the purpose.
What man can you show me who places any value on his time, who reckons the worth of each day, who understands that he is dying daily? For we are mistaken when we look forward to death; the major portion of death has already passed. Whatever years be behind us are in death’s hands.
Seneca’s Letters from a Stoic