Contempt prior to investigation is what enslaves a mind to Ignorance.

This or similar statements are more often misattributed to Herbert Spencer, but the source of the phrase "contempt prior to investigation" seems to have been William Paley, A View of the Evidences of Christianity (1794): "The infidelity of the Gentile world, and that more especially of men of rank and learning in it, is resolved into a principle which, in my judgment, will account for the inefficacy of any argument, or any evidence whatever, viz. contempt prior to examination."