"There is in human nature generally more of the fool than of the wise; and, therefore, those faculties by which the foolish part of men's minds is taken are most potent." —Essay of Boldness 

Mar. : ".... That may you be bold to say in your foolery."

Clo. : "God give them wisdom that have it : and those that are fools, let them use their talents...... Wit, an't be thy will, put me into good fooling! Those wits that think they have thee, do very oft prove fools; and I, that am sure I lack thee, may pass for a wise man: for what says Quinapalus? Better a witty fool than a foolish wit." Twelfth Night 1.5

Clo. : "Foolery, sir, does walk about the orb, like the sun, it shines everywhere. I should be sorry sir, but the fool should be as oft with your master, as with my mistress. I think I saw your wisdom there."

Vio. : "This fellow's a wise enough to play the fool,
And to do that well craves a kind of wit.
............This is a practice
As a full of labour as a wise man's art;
For folly that he wisely shows is fit,
But wise men folly-fallen, taint their wit."Twelfth Night iii. 1

" 'Vent my folly!' he has heard that word of some great man, and now applies it to a fool. " Twelfth Night iv. 1

Mal. : "I am as much in my wits, fool, as thou art."
Clo.: " But as well? Then you are mad indeed, if you be no better in your wits than a fool." Twelfth Night iv. 2.

"Lord ! what fools these mortals be." Midsummer's Night Dream iii. 2 (Puck)

" One of the philosophers was asked, What a wise man differed from a fool? He answered : Send them both naked to those that know them not, and you shall perceive." Bacon's Apophthegms 167, 226 - Sir Francis Bacon's New Advancement of Learning