
“Undoubtedly, as it seems to me at least, satiety of all pursuits causes satiety of life. Boyhood has certain pursuits: does youth yearn for them? Early youth has its pursuits: does the matured or so-called middle stage of life need them? Maturity, too, has such as are not even sought in old age, and finally, there are those suitable to old age. Therefore as the pleasures and pursuits of the earlier periods of life fall away, so also do those of old age; and when that happens man has his fill of life and the time is ripe for him to go.”
Omnino, ut mihi quidem videtur studiorum omnium satietas vitae facit satietatem. Sunt pueritiae studia certa: num igitur ea desiderant adulescentes? Sunt ineuntis adulescentiae: num ea constans iam requirit aetas, quae media dicitur? Sunt etiam eius aetatis: ne ea quidem quaeruntur in senectute. Sunt extrema quaedam studia senectutis: ergo, ut superiorum aetatum studia occidunt, sic occidunt etiam senectutis; quod cum evenit, satietas vitae tempus maturum mortis affert.
section 76 http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A2007.01.0039%3Asection%3D76
Cato Maior de Senectute – On Old Age (44 BC)