The book 1 of Odes of Horacio ("Now is the time to drink!") Contains 38 poems and the poem number 11 (Tu ne quaesieris ... - Carpe Diem !: Do not ask ...- Take advantage of the day), refers to The poet seeks to dissuade Leuconoe from giving heed to the false arts of astrologers and diviners, that It is vain to inquire into the future, that Let us enjoy the present, for this is all we can command. It closes with the famous line: carpe diem, quam minimum credula postero (Seize the day, trusting tomorrow as little as possible). By the way in Roman mythology Leuconoe is a daughter of Neptune and Telmisto and sister of Leuconte; his name means "that of the sincere spirit"; this eleventh hour Horacio dedicates it to Leuconoe, one of the women loved by the poet Horacio.
By the way the poet Horace (Quintus Horatius Flaccus his full name), was born in Venusia, Italy, Roman Republic on December 8, 65 BC (imagine before Christ, see how many years this poem has), he only lived 56 years ; that is, his life was really short; Perhaps, the fact of being a soldier made him presage that his life was going to be short and therefore, he gave great importance to live every day as if it were his last.
We could also interpret this Latin adage as: «do not leave for tomorrow what you can do today» or «live every moment of your life as if it were the last one».