God is never angry for His sake, only for ours.

A song is the exultation of the mind dwelling on eternal things, bursting forth in the voice.

Practical sciences proceed by building up; theoretical science by resolving into components.

All the efforts of the human mind cannot exhaust the essence of a single fly.

A person is disposed to an act of choice by an angel ... in two ways. Sometimes, a man's understanding is enlightened by an angel to know what is good, but it is not instructed as to the reason why ... But sometimes he is instructed by angelic illumination, both that this act is good and as to the reason why it is good.

If there were some solitary or feral man, the passions of the soul would be sufficient for him; by them he would be conformed to things in order that he might have knowledge of them. But because man is naturally political and social, there is need for one man to make his conceptions known to others, which is done with speech. So significant speech was needed if men were to live together. Which is why those of different tongues do not easily live together.

The celebration of Holy Mass is as valuable as the death of Jesus on the cross.