De omnibus dubitandum

It is possible that I am dreaming right now and that all of my perceptions are false.

Divide each difficulty at hand into as many pieces as possible and as could be required to better solve them.

Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has.

Instead I ought to be grateful to Him who never owed me anything for having been so generous to me, rather than think that He deprived me of those things or has taken away from me whatever He did not give me.

Conquer yourself rather than the world.

I experienced in myself a certain capacity for judging which I have doubtless received from God, like all the other things that I possess; and as He could not desire to deceive me, it is clear that He has not given me a faculty that will lead me to err if I use it aright.