The entire method consists in the order and arrangement of the things to which the mind's eye must turn so that we can discover some truth.
Rene DescartesCommon sense is the most widely shared commodity in the world, for every man is convinced that he is well supplied with it.
Rene DescartesCommon sense is the most fairly distributed thing in the world, for each one thinks he is so well-endowed with it that even those who are hardest to satisfy in all other matters are not in the habit of desiring more of it than they already have.
Rene DescartesHuman wisdom remains always one and the same although applied to the most diverse objects and it is no more changed by their diversity than the sunshine is changed by the variety of objects which it illuminates.
Rene Descartes