For it is necessary in every practical science to proceed in a composite (i.e. deductive) manner. On the contrary in speculative science, it is necessary to proceed in an analytical manner by breaking down the complex into elementary principles.

Better to illuminate than merely to shine.

The truth of our faith becomes a matter of ridicule among the infidels if any Catholic, not gifted with the necessary scientific learning, presents as dogma what scientific scrutiny shows to be false.

Temperance is simply a disposition of the mind which binds the passion.

The Study of philosophy is not that we may know what men have thought, but what the truth of things is.

It would be superfluous to receive by faith, things that can be known by natural reason

There is nothing in your mind which wasn't experienced before hand.