23 For as to that which we hear said by you
Then, supposing that we should agree with you that the gods promote good fortune and calamity, not even in this case is there any reason why you should allure some of them to grant you prosperity, and, on the other hand, coax others with sacrifices and rewards not to do you harm. First, because the good gods cannot act badly, even if they have been worshipped with no honour, -- for whatever is mild and placid by nature, is separated widely from the practice and devising of mischief; while the bad knows not to restrain his ferocity, although he should be enticed to do so with a thousand flocks and a thousand altars. For neither can bitterness change itself into sweetness, dryness into moisture, the heat of fire into cold, or what is contrary to anything take and change into its own nature that which is its opposite. So that, if you should stroke a viper with your hand, or caress a poisonous scorpion, the former will attack you with its fangs, the latter, drawing itself together, will fix its sting in you; and your caressing will be of no avail, since both creatures are excited to do mischief, not by the stings of rage, but by a certain peculiarity of their nature. It is thus of no avail to wish to deserve well of the sinister deities by means of sacrifices, since, whether you do this, or on the contrary do not, they follow their own nature, and by inborn laws and a kind of necessity are led to those things, to do which [4873] they were made. Moreover, in this way [4874] both kinds of gods cease to possess their own powers, and to retain their own characters. For if the good are worshipped that they may be favourable, and supplication is made in the same way to the others, on the contrary, that they may not be injurious, it follows that it should be understood that the propitious deities will show no favour if they receive no gifts, and become bad instead of good; [4875] while, on the contrary, the bad, if they receive offerings, will lay aside their mischievous disposition, and become thereafter good: and thus it is brought to this issue, that neither are these propitious, nor are those sinister: or, which is impossible, both are propitious, and both again sinister.
