Chap. v.—5. Wherefore, even if heretics should be truly anxious to correct their error and come to the Church, for the very reason that they believed that they had no baptism unless they received it in the Church, even under these circumstances we should not be bound to yield to their desire for the repetition of baptism; but rather they should be taught, on the one hand, that baptism, though perfect in itself, could in no way profit their perversity if they would not submit to be corrected; and, on the other hand, that the perfection of baptism could not be impaired by their perversity, while refusing to be corrected: and again, that no further perfection is added to baptism in them because they are submitting to correction; but that, while they themselves are quitting their iniquity, that which was before within them to their destruction is now beginning to be of profit for salvation. For, learning this, they will both recognise the need of salvation in Catholic unity, and will cease to claim as their own what is really Christ's, and will not confound the sacrament of truth, although existing in themselves, with their own individual error.