Hardship and Happiness (Ad Marciam De consolatione, Ad Helviam matrem De consolatione, De Consolatione ad Polybium, De Brevitate Vitæ, De Constantia Sapientis, De Tranquillitate Animi, De Otio, De Vita Beata, De Providentia)

by Seneca

You waste time as if it comes from a source full to overflowing, when all the while that very day which is given over to someone or something may be your last.