"A few modern philosopher's assert that an individual's intelligence is a fixed quantity, a quantity which cannot be increased. We must protest and react against this brutal pessimism.... With practice, training, and above all, method, we manage to increase our attention, our memory, our judgment and literally to become more intelligent than we were before."

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It clearly appears that there are no races in the world, however rude, uncultivated, barbarous, gross, or almost brutal they may be, who cannot be persuaded and brought to a good order and way of life, and made domestic, mild and tractable, provided . . . the method that is proper and natural to men is used; that is, love and gentleness and kindness.

— Bartolome de las Casas