STRANGER: Then, Theaetetus, our inference is, that if there is no

motion, neither is there any mind anywhere, or about anything or

belonging to any one.

THEAETETUS: Quite true.

STRANGER: And yet this equally follows, if we grant that all things are

in motion--upon this view too mind has no existence.

THEAETETUS: How so?

STRANGER: Do you think that sameness of condition and mode and subject

could ever exist without a principle of rest?

THEAETETUS: Certainly not.

STRANGER: Can you see how without them mind could exist, or come into

existence anywhere?

THEAETETUS: No.

STRANGER: And surely contend we must in every possible way against him

who would annihilate knowledge and reason and mind, and yet ventures to

speak confidently about anything.

THEAETETUS: Yes, with all our might.

Sophist