As our bodies live upon the earth and find sustenance in the fruits which it produces, so our minds feed on the same truths as the intelligible and immutable substance of the divine Word contains.

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.

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

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.

When I touch a human hand, I touch heaven.

All creatures are united to God alone in an immediate union. They depend essentially and directly upon Him. Being all alike equally impotent, they cannot be in reciprocal dependence upon one another.