"Good intentions are simply not enough. Our character is defined and our lives are determined not by what we want, say or think, but by what we do."

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The view is often defended that sciences should be built up on clear and sharply defined basal concepts. In actual fact no science, not even the most exact, begins with such definitions. The true beginning of scientific activity consists rather in describing phenomena and then in proceeding to group, classify and correlate them.

— Sigmund Freud