"Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence." (Albert Einstein).
2. It is impossible in practice that anyone should avoid having prejudices, even in the gross and derogatory sense of the term. In growing up, we catch them as we catch mumps and chickenpox, but the effect is much worse, for the inoculation we are left with in the case of prejudices is against their being rectified by experience, rather than against our reinfection. In a more refined and philosophical sense, it is absurd to suppose that we should be without prejudice: since proof cannot be endloess, some things must be taken to be so if they seem reasonable or evident, even though we know that we may later learn that we were mistaken. (Max Deutscher, Subjecting and Objecting).