"Cato Major would say, that wise men learn more by fools, than fools by wise men."— Apophthegms 167, 226

" I do much wonder, that one man, seeing how much another man is a fool when he dedicates his behaviours to love, will, after he has laughed at such shallow follies in others, become the argument of his own scorn by falling in love..... He shall never make me such a fool! Much Ado About Nothing ii. 3

" I have deceived your very eyes. What your learned wisdoms could not discover, these shallow fools have brought to light." Much Ado Nothing v. i

"Nature.... perceiving our natural wits too dull to reason, hath sent this natural for ur whetstone : for always, the dulness of the fool is the whetstone of the wits." As You Like It i. 1. ( See further of Touchstone and also of Jacques, As You Like It vi. 7, 1060.)

Fool: " Dost thou know the difference, my boy, between a sweet fool and a bitter one?"
Lear : " No, lad, teach me."

Fool : " That lord, that counsell'd thee
To give away thy land;
Come, place him here by me,
Do thou for him stand :
The sweet and bitter fool
Will presently appear
The one in motley here,
The other found out there."

Lear : "Dost thou call me fool, boy?"
Fool: "All thy other titles thou hast given away, that thou wast
born with."
Kent : "This is not altogether fool, my lord," See Lear i. v. 96203. - Sir Francis Bacon's New Advancement of Learning