Book 2
8.93
They also held that nothing is just or honourable or base by nature, but only by convention and custom. Nevertheless the good man will be deterred from wrong-doing by the penalties imposed and the prejudices that it would arouse. Further that the wise man really exists. They allow progress to be attainable in philosophy as well as in other matters. They maintain that the pain of one man exceeds that of another, and that the senses are not always true and trustworthy.
8.93
The school of Hegesias, as it is called, adopted the same ends, namely pleasure and pain. In their view there is no such thing as gratitude or friendship or beneficence, because it is not for themselves that we choose to do these things but simply from motives of interest, apart from which such conduct is nowhere found.
8.94
They denied the possibility of happiness, for the body is infected with much suffering, while the soul shares in the sufferings of the body and is a prey to disturbance, and fortune often disappoints. From all this it follows that happiness cannot be realized. Moreover, life and death are each desirable in turn. But that there is anything naturally pleasant or unpleasant they deny; when some men are pleased and others pained by the same objects, this is owing to the lack or rarity or surfeit of such objects. Poverty and riches have no relevance to pleasure; for neither the rich nor the poor as such have any special share in pleasure.