For there is hardly any question in the sciences about which clever men have not frequently disagreed. But whenever two persons make opposite judgeme… - René Descartes

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

It is useful to know something of the manners of different nations, that we may be enabled to form a more correct judgment regarding our own, and be prevented from thinking that everything contrary to our customs is ridiculous and irrational, a conclusion usually come to by those whose experience has been limited to their own country.

[About Pierre de Fermat] It cannot be denied that he has had many exceptional ideas, and that he is a highly intelligent man. For my part, however, I have always been taught to take a broad overview of things, in order to be able to deduce from them general rules, which might be applicable elsewhere.