“The good Christian should beware of mathematicians. The danger already exists that mathematicians have made a covenant with the devil to darken the spirit and confine man in the bonds of Hell.”

“The wicked make all God's good works serve evil purposes but the person of good will, to the contrary, makes the evil doings of the wicked serve good purposes.”

“In matters that are so obscure and far beyond our vision, we find in Holy Scripture passages which can be interpreted in very different ways without prejudice to the faith we have received. In such cases, we should not rush in headlong and so firmly take our stand on one side that, if further progress in the search for truth justly undermines this position, we too fall with it.”

“Since you cannot do good to all, you are to pay special attention to those who, by accidents of time, or place, or circumstance, are brought into closer connection with you.”

“I have read in Plato and Cicero sayings that are wise and very beautiful; but I have never read in either of them: Come unto me all ye that labor and are heavy laden.”

“The wicked have told me of things that delight them, but not such things as your law has to tell.”

“If you would attain to what you are not yet, you must always be displeased by what you are. For where you are pleased with yourself there you have remained. Keep adding, keep walking, keep advancing.”