"Your discourse is very concluding; in confirmation of which we have the example of those who understand, or have known some thing, which the more knowing they are, the more they know, and freely confesse that they know little; nay, the wisest man in all Greece, and for such pronounced by the Oracle, openly professed to know that he knew nothing."
January 1, 1970
https://en.wikiquote.org/wiki/The_Systeme_of_the_World%3A_in_Four_Dialogues