You will not dishonor the divine perfections by judgments unworthy of them, provided you never judge of Him by yourself, provided you do not ascribe to the Creator the imperfections and limitations of created beings.

We are rational creatures: Our virtue and perfection is to love reason, or rather to love order.

I do not believe there is anything useful which men can know with exactitude that they cannot know by arithmetic and algebra.

One should assiduously pursue perfection without ever claiming to attain it.

Just as our eyes need light in order to see, our minds need ideas in order to create.

I beg of you always to dwell upon the necessity of a thorough understanding of principles, in order to stop the vivacity of his mind, and please do not forget to meditate upon the subject of our discussion.

You find yourself in the world, without any power, immovable as a rock, stupid, so to speak, as a log of wood.