The greatest loss of time is delay and expectation, which depend upon the future. We let go the present, which we have in our power, and look forward to that which depends upon chance, and so relinquish a certainty for an uncertainty.
Seneca the YoungerWe deliberate about the parcels of life, but not about life itself, and so we arrive all unawares at its different epochs, and have the trouble of beginning all again. And so finally it is that we do not walk as men confidently towards death, but let death come suddenly upon us.
Seneca the Younger