Come now, my dear Lucius, build in your imagination the lofty and towering structure of the virtues; then you will feel no doubt that those who achieve them, guiding themselves by magnanimity and uprightness, are always happy; realizing as they do that all the vicissitudes of fortune, the ebb and flow of time and of circumstance, will be trifling and feeble if brought into conflict with virtue. The things we reckon as bodily goods do, it is true, form a factor in supreme happiness, but yet happiness is possible without them. For those supplementary goods are so small and slight that in the full radiance of the virtues they are as invisible as the stars in sunlight. […] This is the language that a man will hold who while not despising all else but virtue yet extols virtue herself with her own proper praises; in short, this is the full, finished and complete account of the Chief Good.
[Cicero, De finibus bonorum et malorum 5.24.71-73]
