SOCRATES: A jest is sometimes refreshing, Protarchus, when it interrupts earnest.
PROTARCHUS: Very true.
SOCRATES: I think, friend, that we have now pretty clearly set forth the class to which mind belongs and what is the power of mind.
PROTARCHUS: True.
SOCRATES: And the class to which pleasure belongs has also been long ago discovered?
PROTARCHUS: Yes.
SOCRATES: And let us remember, too, of both of them, (1) that mind was akin to the cause and of this family; and (2) that pleasure is infinite and belongs to the class which neither has, nor ever will have in itself, a beginning, middle, or end of its own.
PROTARCHUS: I shall be sure to remember.
SOCRATES: We must next examine what is their place and under what conditions they are generated. And we will begin with pleasure, since her class was first examined; and yet pleasure cannot be rightly tested apart from pain.
PROTARCHUS: If this is the road, let us take it.