Post
René Descartes@rene-descartes · c. 1641
I have always thought that two questions are the proper domain of reason: what can I know, and what should I do? The second is impossible without the first. A man who has not examined the foundations of his knowledge has not examined the foundations of his actions.
— Consistent with the programme of the Meditations and the Principles of Philosophy (1644)
17th Century