, and also of certain sensations that affect us, as of pain, colours, tastes, etc. , although we do not yet know the cause of our being so affected; and, comparing what we have now learned, by examining those things in their order, with our former confused knowledge of them, we will acquire the habit of forming clear and distinct conceptions of all the objects we are capable of knowing. In these few precepts seem to me to be comprised the most general and important principles of human knowledge.

That we ought to prefer the divine authority to our perception: 34 but that, apart from things revealed, we ought to assent to nothing that we do not clearly apprehend.