One of the first of the considerations that occurred to me was that there is very often less perfection in works composed of several portions, and ca… - René Descartes

there is often not so much perfection in works composed of many pieces and made by the hands of various master craftsmen as there is in those works on which but a single individual has worked.

For since, with a little well-directed effort, one can change the movements of the brain in animals devoid of reason, it is clear that this can be done even more successfully in human beings, and that even those who have the weakest souls could acquire a very absolute command of all their passions, if one were to take the trouble to train them and guide them properly.

En realidad, la hipótesis del genio maligno ni es un juego ni un círculo de hierro, sino un movimiento dialéctico, muy importante en el curso del pensamiento cartesiano. Repárese en que la hipótesis del genio maligno, necesita, para ser destruida, la demostración de la existencia de Dios. Sólo cuando sabemos que Dios existe y que Dios es incapaz de engañarnos, sólo entonces queda deshecha la última

Whenever enyone has offended me, I try to raise my soul so high that the offense cannot reach it.