Divide each difficulty into as many parts as is feasible and necessary to resolve it.
Rene DescartesThe 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 DescartesSome years ago I was struck by the large number of falsehoods that I had accepted as true in my childhood, and by the highly doubtful nature of the whole edifice that I had subsequently based on them. I realized that it was necessary, once in the course of my life, to demolish everything completely and start again right from the foundations if I wanted to establish anything at all in the sciences that was stable and likely to last.
Rene Descartes