according to the measure of his grace, provided he do it decently and in order; that is to say, that we should neither forsake the communion of the Church, nor, by continuing in it, disturb its peace and well regulated discipline. XIII. But in bearing with imperfections of life, we ought to carry our indulgence a great deal further. For this is a point in which we are very liable to err, and here Satan lies in wait to deceive us with no common devices. For there have always been persons, who, from a false notion of perfect sanctity, as if they were already become disembodied spirits, despised the society of all men in whom they could discover any remains of human infirmity. Such, in ancient times, were the Cathari, and also the Donatists, who approached to the same folly. Such, in the present day, are some of the Anabaptists, who would be thought to have made advances in piety beyond all others. There are others who err, more from an inconsiderate zeal for righteousness, than from this unreasonable pride. For when they perceive, that among those to whom the gospel is preached, its doctrine is not followed by correspondent effects in the life, they immediately pronounce, that there no church exists. This is, indeed, a very just ground of offence, and one for which we furnish more than sufficient occasion in the present unhappy age; nor is it possible to excuse our abominable inactivity, which the Lord will not suffer to escape with impunity, and which he has already begun to chastise with heavy scourges. Woe to us, therefore, who, by the dissolute licentiousness of our crimes, cause weak consciences to be wounded on our account! But, on the other hand, the error of the persons of whom we now speak, consists in not knowing how to fix any limits to their offence. For where our Lord requires the exercise of mercy, they entirely neglect it, and indulge themselves in immoderate severity. Supposing it impossible for the Church to exist, where there is not a perfect purity and integrity of life, through a hatred of crimes they depart from the true Church, while they imagine themselves to be only withdrawing from the factions of the wicked. They allege, that the Church of Christ is holy. But that they may also understand, that it is composed of good and bad men mingled together, let them hear that parable from the lips of Christ, where it is compared to a net, in which fishes of all kinds are collected, and no separation is made till they are exposed on the shore.[747] Let them hear another parable, comparing the Church to a field, which, after having been sown with good seed, is, by the craft of an enemy, corrupted with tares, from which it is never cleared till the harvest is brought into the barn.[748] Lastly, let them hear another comparison of the Church to a threshing-floor, in which the wheat is collected in such a manner, that it lies concealed under the chaff, till, after being carefully purged, by winnowing and sifting, it