I suppose therefore that all things I see are illusions; I believe that nothing has ever existed of everything my lying memory tells me. I think I ha… - René Descartes

Porque por naturaleza, considerada en general, no entiendo otra cosa sino Dios mismo, o bien el orden y la disposición que Dios ha establecido en las cosas creadas. Y por mi naturaleza en particular, no entiendo otra cosa sino la complexión o reunión de todo aquello que Dios me ha dado.

Science in its entirety is true and evident cognition.

was most keen on mathematics, because of its certainty and the incontrovertibility* of its proofs; but I did not yet see its true use. Believing as I did that its only application was to the mechanical arts,* I was astonished that nothing more exalted had been built on such sure and solid foundations; whereas, on the other hand, I compared the moral works of ancient pagan writers to splendid and magnificent palaces built on nothing more than sand and mud.