Who said "Silence is a gift, but not when you're trying to speak."?

This quote is attributed to Milo.

Silence is a gift, but not when you're trying to speak. - Milo

"Silence is a gift, but not when you're trying to speak."

Milo

Character in The Phantom Tollbooth

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"The journey matters more than the destination, and there's joy in discovering what you didn't know you were looking for"

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"There was once a boy named Milo who didn't know what to do with himself—not because he was busy, but because he was bored."

"It seems to me that almost everything is a waste of time."