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The mind that finds its way to wild places is the poet's; but the mind that never finds its way back is the lunatic's.

"What's Wrong with the World". Book by G. K. Chesterton, Part Three: Feminism, or The Mistake About Woman, Ch. 3: The Emancipation of Domesticity, 1910.
The mind that finds its way to wild places is the poet's; but the mind that never finds its way back is the lunatic's.