Philosophy has had from its earliest days two different objects which were believed to be closely interrelated. On the one hand, it aimed at a theoretical understanding of the structure of the world; on the other hand, it tried to discover and inculcate the best possible way of life. From Heraclitus to Hegel, or even to Marx, it consistently kept both ends in view; it was neither purely theoretical nor purely practical, but sought a theory of the universe upon which to base a practical ethic.
Bertrand Russell
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