However, what is "a long time" in a man's nature? Even if anyone lived for a long time ( I see it written that a certain Arganthonius indeed lived for a hundred and twenty years), to me it seems that no life that has an end is long. Hours indeed pass by, and months, and years, past time never returns nor can the future be known. Because time is given to us, we ought to be happy and content with it. - Cicero (from his essay "On Old Age")
Most Latin doesn't sound very good when translated directly to English, so I did a bit of tweaking to make it sound better, but other than that he was such an amazing writer!