In the first place, Descartes stands for the most explicit and uncompromising dualism between mind and matter.
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Einstein said, if everything exists as a substance of qualities, and qualities exist only in mind, then all is mind.
The free man must be born before freedom can be won, and the brotherly man must be born before full brotherhood can be won. It will come into being only if we build it out of our very muscle and bone - by trying to act it out.

