The thinking of the mind is twofold: understanding and willing. - René Descartes

But immediately upon this I observed that, whilst I thus wished to think that all was false, it was absolutely necessary that I, who thus thought, should be somewhat; and as I observed that this truth, I think, therefore I am (COGITO ERGO SUM), was so certain and of such evidence that no ground of doubt, however extravagant, could be alleged by the sceptics capable of shaking it, I concluded that I might, without scruple, accept it as the first principle of the philosophy of which I was in search

Il buon senso è la cosa meglio distribuita al mondo. Ciascuno infatti pensa di esserne così ben provvisto che anche coloro che di tutte le altre cose non si contentano mai, di questa sono soliti non volerne più di quanto ne hanno.

Cuando la conciencia del individuo queda reducida a reflejar la conciencia colectiva del grupo social, el pensamiento se hace siervo de los dogmas colectivos; el hombre se recluye en el organismo superior de la nación o clase, y el concepto de lo humano se disuelve