The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge.
Cogito ergo sum
From 'Rules for the Direction of the Mind'
1628
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"He who has a firm and stable mind will find that in all conditions of life he can be master of himself."
Strange & Unusual"The whole of philosophy is like a tree, whose roots are metaphysics, whose trunk is physics, and whose branches are all the other sciences."
Controversial"Whenever anyone has offended me, I try to raise my soul so high that the offense cannot reach it."
Controversial"For it is not enough to have a good mind, but rather it is necessary to apply it well."
Strange & Unusual"The nature of the mind is entirely distinct from that of the body."
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