As long as a religion rests upon those sentiments which are the consolation of all affliction, it may attract the affections of mankind. But if it be mixed up with the bitter passions of the world, it may be constrained to defend allies whom its interests, and not the principle of love, have given to it; or to repel as antagonists men who are still attached to its own spirit, however opposed they may be to the powers to which it is allied. The Church cannot share the temporal power of the State without being the object of a portion of that animosity which the latter excites. The political powers which seem to be most firmly established have frequently no better guarantee for their duration than the opinions of a generation, the interests of the time, or the life of an individual. A law may modify the social condition which seems to be most fixed and determinate; and with the social condition everything else must change. The powers of society are more or less fugitive, like the years which we spend upon the earth; they succeed each other with rapidity, like the fleeting cares of life; and no government has ever yet been founded upon an invariable disposition of the human heart, or upon an imperishable interest. As long as a religion is sustained by those feelings, propensities, and passions which are found to occur under the same forms, at all the different periods of history, it may defy the efforts of time; or at least it can only be destroyed by another religion. But when religion clings to the interests of the world, it becomes almost as fragile a thing as the powers of earth. It is the only one of them all which can hope for immortality; but if it be connected with their ephemeral authority, it shares their fortunes, and may fall with those transient passions which supported them for a day. The alliance which religion contracts with political powers must needs be onerous to itself; since it does not require their assistance to live, and by giving them its assistance it may be exposed to decay. The danger which I have just pointed out always exists, but it is not always equally visible. In some ages governments seem to be imperishable; in others, the existence of society appears to be more precarious than the life of man. Some constitutions plunge the citizens into a lethargic somnolence, and others rouse them to feverish excitement. When governments appear to be so strong, and laws so stable, men do not perceive the dangers which may accrue from a union of Church and State. When governments display so much weakness, and laws so much inconstancy, the danger is self-evident, but it is no longer possible to avoid it; to be effectual, measures must be taken to discover its approach.