... always keep in mind that an article of faith is not something that the faithful assume. Faith, for those who have it, is the most certain form of knowledge, not a tentative opinion.

Angels are able to know and understand better than the human intellect can, precisely because such knowledge and understanding comes to them by way of ideas infused in them by God.

Conjugal love, or the friendship of spouses, persists after sexual desires have weakened, withered, and disappeared.

Friendship is a very taxing and arduous form of leisure activity.

I find the selectivity of erotic love - the choice of this man or this woman - much more intelligible if liking the person is the origin of sexual interest, rather than the other way.

One of the aims of sexual union is procreation - the creation by reproduction of an image of itself, of the union.

Political democracy cannot flourish under all economic conditions. Democracy requires an economic system which supports the political ideals of liberty and equality for all. Men cannot exercise freedom in the political sphere when they are deprived of it in the economic sphere.