If I simply refrain from making a judgment in cases where I do not perceive the truth with sufficient clarity and distinctness, then it is clear that I am behaving correctly and avoiding error.

On the one hand I have a clear and distinct idea of myself, in so far as I am a thinking, non-extended thing; and on the other hand I have a distinct idea of body, in so far a this is simply an extended, non-thinking thing. And, accordingly, it is certain that I am really distinct from my body, and exist without it.

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.

Variant: When it is not in our power to follow what is true, we ought to follow what is most probable.

Good sense is, of all things among men, the most equally distributed; for every one thinks himself so abundantly provided with it, that those even who are the most difficult to satisfy in everything else, do not usually desire a larger measure of this quality than they already possess.

Sensations are nothing but confused modes of thinking.

I am indeed amazed when I consider how weak my mind is and how prone to error.