Whenever enyone has offended me, I try to raise my soul so high that the offense cannot reach it. - René Descartes

To begin with, I see that it is impossible that God should ever deceive me. Only someone who has something wrong with him will engage in trickery or deception. That someone is able to deceive others may be a sign of his skill or power, but his wanting to deceive them is a sign of his malice or weakness; and those are not to be found in God. Next, I know from experience that I have a faculty of judgment; and this, like everything else I have, was given to me by God. Since God doesn’t want to deceive me, I am sure that he didn’t give me a faculty of judgment that would lead me into error while I was using it correctly.

El esquema de la demostración es el siguiente: la existencia es una perfección; Dios tiene todas las perfecciones; luego Dios tiene la existencia. Como se ve, Descartes considera la existencia de Dios tan segura y evidentemente demostrada como la propiedad del triángulo de tener tres ángulos.

Gratitude is a species of love, excited in us by some action of the person for whom we have it, and by which we believe that he has done some good to us, or at least that he has had the intention of doing so.

Passions, III, 193. XI, 473-474. Trans. John Morris