SOCRATES: Let us take you and me, or anything as an example:--There is Socrates in health, and Socrates sick--Are they like or unlike? THEAETETUS: You mean to compare Socrates in health as a whole, and Socrates in sickness as a whole? SOCRATES: Exactly; that is my meaning. THEAETETUS: I answer, they are unlike. SOCRATES: And if unlike, they are other? THEAETETUS: Certainly. SOCRATES: And would you not say the same of Socrates sleeping and waking, or in any of the states which we were mentioning? THEAETETUS: I should. SOCRATES: All agents have a different patient in Socrates, accordingly as he is well or ill. THEAETETUS: Of course. SOCRATES: And I who am the patient, and that which is the agent, will produce something different in each of the two cases? THEAETETUS: Certainly. SOCRATES: The wine which I drink when I am in health, appears sweet and pleasant to me? THEAETETUS: True. SOCRATES: For, as has been already acknowledged, the patient and agent meet together and produce sweetness and a perception of sweetness, which are in simultaneous motion, and the perception which comes from the patient makes the tongue percipient, and the quality of sweetness which arises out of and is moving about the wine, makes the wine both to be and to appear sweet to the healthy tongue. THEAETETUS: Certainly; that has been already acknowledged. SOCRATES: But when I am sick, the wine really acts upon another and a different person? THEAETETUS: Yes. SOCRATES: The combination of the draught of wine, and the Socrates who is sick, produces quite another result; which is the sensation of bitterness in the tongue, and the motion and creation of bitterness in and about the wine, which becomes not bitterness but something bitter; as I myself become not perception but percipient? THEAETETUS: True. SOCRATES: There is no other object of which I shall ever have the same perception, for another object would give another perception, and would make the percipient other and different; nor can that object which affects me, meeting another subject, produce the same, or become similar, for that too would produce another result from another subject, and become different. THEAETETUS: True. SOCRATES: Neither can I by myself, have this sensation, nor the object by itself, this quality. THEAETETUS: Certainly not. SOCRATES: When I perceive I must become percipient of something--there can be no such thing as perceiving and perceiving nothing; the object, whether it become sweet, bitter, or of any other quality, must have relation to a percipient; nothing can become sweet which is sweet to no one. THEAETETUS: Certainly not.