De omnibus dubitandum

God alone is the author of all the motions in the world.

I can doubt everything, except one thing, and that is the very fact that I doubt. Simply put - I think, therefore I am

But I cannot forget that, at other times I have been deceived in sleep by similar illusions; and, attentively considering those cases, I perceive so clearly that there exist no certain marks by which the state of waking can ever be distinguished from sleep, that I feel greatly astonished; and in amazement I almost persuade myself that I am now dreaming.

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

There is a great difference between mind and body insomuch as body is by nature always divisible, and the mind is entirely indivisible.

I have concluded the evident existence of God, and that my existence depends entirely on God in all the moments of my life, that I do not think that the human spirit may know anything with greater evidence and certitude.