Yes, as each one of us bears within him two men, whose unceasing struggle makes up the whole prize and the whole grandeur of the moral life, so in like manner each age of the world bears within it two ages: the one which is the docile instrument of God in the pursuit of truth and the accomplishment of justice; and the other, which paralyzes a part of the living forces of humanity by leading them astray into error, or by putting them to the service of selfishness and evil.
This grand principle of the philosophy of history, due to Christian psychology and the true knowledge by man of himself, has been admirably demonstrated by St. Augustine. One sees, from numerous passages in his writings, how that holy doctor was impressed by the perpetual antagonism and irreconcilable opposition between these two powers, or "cities," (as he terms them,) who always and everywhere are making war upon each other, and to whom each succeeding century serves but as a battle-field.
Quite as much and even more than others, does the sixteenth century present to the look of the observer the militant dualism of these two principles: the one, calling itself the Reformation of the church by disorder and violence; the other, wishing to be, and which has been, the fruitful and pacific renovation of Christian life by humble zeal and true charity. The Protestant Reformation claims the sixteenth century as exclusively its own. I believe I have sufficiently demonstrated that, by its most beautiful and most enduring parts and characteristics, the century belongs neither to Luther nor Calvin; but that the Catholic Church can exhibit it with just pride alike to her friends and her enemies.
From this study, made in the light of this principle, I would also deduce a second conclusion and apply it directly to the times in which we live.
Are we not ourselves witnesses of and actors in a struggle like or analogous to that which, before our day, divided our fathers? Yes, our century, soon to complete the third quarter of its term, itself also is engaged in this struggle between, so to term it, two opposing cities or communities. For some time past, this struggle seems to have entered upon a new phase and into a most sharp crisis.