CHAP. XVII.--26. Therefore, whether they seem to abide within, or are openly outside, whatsoever is flesh is flesh, and what is chaff is chad, whether they persevere in remaining in their barrenness on the threshing-floor, or, when temptation befalls them, are carried out as it were by the blast of some wind. And even that man is always severed from the unity of the Church which is without a spot or wrinkle,[49] who associates with the congregation of the saints in carnal obstinacy. Yet we ought to despair of no man, whether he be one who shows himself to be of this nature within the pale of the Church, or whether he more openly opposes it from without. But the spiritual, or those who are steadily advancing with pious exertion towards this end, do not stray without the pale; since even when, by some perversity or necessity among men, they seem to be driven forth, they are more approved than if they had remained within, since they are in no degree roused to contend against the Church, but remain rooted in the strongest foundation of Christian charity on the solid rock of unity. For hereunto belongs what is said in the sacrifice of Abraham: "But the birds divided he not."[50] * * * * * CHAP. XVIII.--27. On the question of baptism, then, I think that I have argued at sufficient length; and since this is a most manifest schism which is called by the name of the Donatists, it only remains that on the subject of baptism we should believe with pious faith what the universal Church maintains, apart from the sacrilege of schism. And yet, if within the Church different men still held different opinions on the point, without meanwhile violating peace, then till some one clear and simple decree should have been passed by an universal Council, it would have been right for the charity which seeks for unity to throw a veil over the error of human infirmity, as it is written, "For charity shall cover the multitude of sins."[51] For, seeing that its absence causes the presence of all other things to be of no avail, we may well suppose that in its presence there is found pardon for the absence of some missing things.