Who said "Evil is no mystical force"?

This quote is attributed to Mrs. Which.

Evil is no mystical force - Mrs. Which

"Evil is no mystical force"

Mrs. Which Truth

Character in A Wrinkle in Time

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"The mind power of evil is great"

"Your father needs you"

"IT thinks with the brains"

"Evil requires conformity"

"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."