[MD] On dialectic before knowledge

[X Acto]

Str. But whereas some appear to have arrived at the conclusion that all ignorance is involuntary, 
and that no one who thinks himself wise is willing to learn any of those things in which he is 
conscious of his own cleverness, and that the admonitory sort of instruction gives much trouble 
and does little good- 

Theaet. There they are quite right. 

Str. Accordingly, they set to work to eradicate the spirit of conceit in another way. 

Theaet. In what way? 

Str. They cross-examine a man's words, when he thinks that he is saying something and is 
really saying nothing, and easily convict him of inconsistencies in his opinions; these 
they then collect by the dialectical process, and placing them side by side, show that 
they contradict one another about the same things, in relation to the same things, and 
in the same respect. He, seeing this, is angry with himself, and grows gentle towards 
others, and thus is entirely delivered from great prejudices and harsh notions, in a 
way which is most amusing to the hearer, and produces the most lasting good effect on 
the person who is the subject of the operation. For as the physician considers that the 
body will receive no benefit from taking food until the internal obstacles have been 
removed, so the purifier of the soul is conscious that his patient will receive no 
benefit from the application of knowledge until he is refuted, and from refutation 
learns modesty; he must be purged of his prejudices first and made to think that he 
knows only what he knows, and no more. 

Theaet. That is certainly the best and wisest state of mind. 

-Plato "Sophist"