If we tread our vices under our feet, we make of them a ladder by which to rise to higher things.

Let your old age be childlike, and your childhood like old age; that is, so that neither may your wisdom be with pride, nor your humility without wisdom.

The good Christian should beware the mathematician and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with the devil to darken the spirit and to confine man in the bonds of hell.

If you don't believe it you won't understand it.

It is He who gave to this intellectual nature free-will of such a kind, that if he wishes to forsake God his blessedness, misery should forthwith result.

Believe that you may understand.

Complete abstinence is easier than perfect moderation.