'But surely "blind" is just how you would describe men who have no true knowledge of reality, and no clear standard in their mind to refer to, as a painter refers to his model, and which they can study closely before they start laying down rules about what is fair or right or good where they are needed, or maintaining, as Guardians, any rules that already exist.'
'Yes, blind is just about what they are'
The soul of him who has education is whole and perfect and escapes the worst disease, but, if a man's education be neglected, he walks lamely through life and returns good for nothing to the world below.
The cause of all the blunders committed by man arises from this excessive self-love. For the lover is blinded by the object loved; so that he passes a wrong judgment on what is just, good and beautiful, thinking that he ought always to honor what belongs to himself in preference to truth. For he who intends to be a great man ought to love neither himself nor his own things, but only what is just, whether it happens to be done by himself, or by another.
We must, if we are to be consistent, and if we re to have a real pedigree herd, mate the best of our men with the best of our women as often as possible, and the inferior men with the inferior women as seldom as possible, and keep only the offspring of the best.