It is scientists and theologians that need to be brought together, not merely science and theology.

Since we astronomers are Priests of the Most High God with respect to the Book of Nature, it behooves us that we do not aim at the glory of our own spirit, but above everything else at the glory of God.

The Holy Scripture and Nature equally proceed from the divine Word, the former as the dictation of the Holy Ghost and the latter as most observant executrix of God’s command.

You have had the good fortune to find real teachers, authentic friends, who have taught you everything you wanted to know without holding back. You have had no need to employ any tricks to steal their knowledge, because they led you along the easiest path, even though it had cost them a lot of hard work and suffering to discover it. Now, it is your turn to do the same, with one person, and another — with everyone.

There is no excuse for those who could be scholars and are not.

Study. Study in earnest. If you are to be salt and light, you need knowledge, ability. Or do you imagine that an idle and lazy life will entitle you to receive infused knowledge?

In its depth I saw ingathered, bound by love in one single volume, that which is dispersed in leaves throughout the universe: substances and accidents and their relations, as though fused together in such a way that what I tell is but a simple light.

It is the divine page that you must listen to; it is the book of the universe that you must observe. The pages of Scripture can only be read by those who know how to read and write, while everyone, even the illiterate, can read the book of the universe.

Some people in order to discover God, read a book. But there is a great book: the very appearance of created things. Look above and below, note, read. God whom you want to discover, did not make the letters with ink; he put in front of your eyes the very things that he made. Can you ask for a louder voice than that?

The scanty conceptions to which we can attain of celestial things give us, from their excellence, more pleasure than all our knowledge of the world in which we live; just as a half glimpse of persons that we love is more delightful than an accurate view of other things.