Since the corruption of an idea, as far as the appearance goes, is a sort of accident or affection of its development, being the end of a course, and a transition-state leading to a crisis, it is, as has been observed above, a brief and rapid process. While ideas live in men's minds, they are ever enlarging into fuller development: they will not be stationary in their corruption any more than before it; and dissolution is that further state to which corruption tends. Corruption cannot, therefore, be of long standing; and thus _duration_ is another test of a faithful development. _Si gravis, brevis; si longus, levis_; is the Stoical topic of consolation under pain; and of a number of disorders it can even be said, The worse, the shorter. Sober men are indisposed to change in civil matters, and fear reforms and innovations, lest, if they go a little too far, they should at once run on to some great calamities before a remedy can be applied. The chance of a slow corruption does not strike them. Revolutions are generally violent and swift; now, in fact, they are the course of a corruption. 2. The course of heresies is always short; it is an intermediate state between life and death, or what is like death; or, if it does not result in death, it is resolved into some new, perhaps opposite, course of error, which lays no claim to be connected with it. And in this way indeed, but in this way only, an heretical principle will continue in life many years, first running one way, then another. The abounding of iniquity is the token of the end approaching; the faithful in consequence cry out, How long? as if delay opposed reason as well as patience. Three years and a half are to complete the reign of Antichrist. Nor is it any real objection that the world is ever corrupt, and yet, in spite of this, evil does not fill up its measure and overflow; for this arises from the external counteractions of truth and virtue, which bear it back; let the Church be removed, and the world will soon come to its end. And so again, if the chosen people age after age became worse and worse, till there was no recovery, still their course of evil was continually broken by reformations, and was thrown back upon a less advanced stage of declension. 3.