Who said "You can never be too careful about what you say."?

This quote is attributed to King Azaz.

You can never be too careful about what you say. - King Azaz

"You can never be too careful about what you say."

King Azaz Truth

Character in The Phantom Tollbooth

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"Words can be commended, debased, or ignored, but they cannot be reversed."

"You can never be too careful when choosing the words you use."

"Words are such wonderful things."

"Let me see your mind."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."