For Twelfth Night:

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Detail of cover,
collection of stories
by Zenna Henderson

In Twelfth Night, the character Feste

“.. seems to be the wisest person within all the characters in the comedy. Viola remarks this by saying ‘This fellow’s wise enough to play the fool’…. Since Feste is a licensed fool, his main role in Twelfth Night is to speak the truth. This is where the humor lies….”

— Field-of-Themes.com