Socrates
Now answer this further question: you say that if one acquires more than the amount one has spent, it is gain?
Friend
I do not mean, when it is evil, but if one gets more gold or silver than one has spent.
Socrates
Now, I am just going to ask you about that. Tell me, if one spends half a pound of gold and gets double that weight in silver, has one got gain or loss?
Friend
Loss, I presume, Socrates for one's gold is reduced to twice, instead of twelve times, the value of silver.
Socrates
But you see, one has got more; or is double not more than half?
Friend
Not in worth, the one being silver and the other gold.
-- Plato's Hipparchus 231cd
