PROTARCHUS: Well, I have been considering, and I can hardly think that any other science or art has a firmer grasp of the truth than this. SOCRATES: Do you say so because you observe that the arts in general and those engaged in them make use of opinion, and are resolutely engaged in the investigation of matters of opinion? Even he who supposes himself to be occupied with nature is really occupied with the things of this world, how created, how acting or acted upon. Is not this the sort of enquiry in which his life is spent? PROTARCHUS: True. SOCRATES: He is labouring, not after eternal being, but about things which are becoming, or which will or have become. PROTARCHUS: Very true. SOCRATES: And can we say that any of these things which neither are nor have been nor will be unchangeable, when judged by the strict rule of truth ever become certain? PROTARCHUS: Impossible. SOCRATES: How can anything fixed be concerned with that which has no fixedness? PROTARCHUS: How indeed? SOCRATES: Then mind and science when employed about such changing things do not attain the highest truth? PROTARCHUS: I should imagine not. SOCRATES: And now let us bid farewell, a long farewell, to you or me or Philebus or Gorgias, and urge on behalf of the argument a single point. PROTARCHUS: What point? SOCRATES: Let us say that the stable and pure and true and unalloyed has to do with the things which are eternal and unchangeable and unmixed, or if not, at any rate what is most akin to them has; and that all other things are to be placed in a second or inferior class. PROTARCHUS: Very true. SOCRATES: And of the names expressing cognition, ought not the fairest to be given to the fairest things? PROTARCHUS: That is natural. SOCRATES: And are not mind and wisdom the names which are to be honoured most? PROTARCHUS: Yes. SOCRATES: And these names may be said to have their truest and most exact application when the mind is engaged in the contemplation of true being? PROTARCHUS: Certainly. SOCRATES: And these were the names which I adduced of the rivals of pleasure? PROTARCHUS: Very true, Socrates. SOCRATES: In the next place, as to the mixture, here are the ingredients, pleasure and wisdom, and we may be compared to artists who have their materials ready to their hands. PROTARCHUS: Yes. SOCRATES: And now we must begin to mix them? PROTARCHUS: By all means. SOCRATES: But had we not better have a preliminary word and refresh our memories? PROTARCHUS: Of what? SOCRATES: Of that which I have already mentioned. Well says the proverb, that we ought to repeat twice and even thrice that which is good. PROTARCHUS: Certainly. SOCRATES: Well then, by Zeus, let us proceed, and I will make what I believe to be a fair summary of the argument. PROTARCHUS: Let me hear.