" The common sense is the best distributed thing in the world, everyone thinks it's so well equipped that even the most difficult to please in every other aspect not usually want more of what they own"
René Descartes
From the deepest beggining of the times people has been looking for the true and in the very beggining as far as they were ingnorants, they decided to trust in the idea of gods, magicians, priest. It means the true was given by the authority of other people but not for the reason.
Descartes began a new time, the use of intelligence and the reason. The first step was forgetting everything known as true, and the submition of every idea to the light of reason.
If by any chance the idea could not support the analysis, this idea had to be errased from the mind.
It meant to start the process of knownledge from the most small and simple unity in order to built up the most complex ideas. This is the cartesian method
In the way of this process people had to eliminate any idea born from the religion.

