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To prejudge other men's notions before we have looked into them is not to show their darkness but to put out our own eyes.

John Locke (1824). “Of human understanding. A defence of Mr. Locke's opinion concerning personal identity. Of the conduct of the understanding. Some thoughts concerning reading and study for a gentleman. Elements of natural philosophy. A new method of common-place-book”, p.261
To prejudge other men's notions before we have looked into them is not to show their darkness but to put out our own eyes.