CHAP. I.--1. The comparison of the Church with Paradise[178] shows us that men may indeed receive her baptism outside her pale, but that no one outside can either receive or retain the salvation of eternal happiness. For, as the words of Scripture testify, the streams from the fountain of Paradise flowed copiously even beyond its bounds. Record indeed is made of their names; and through what countries they flow, and that they are situated beyond the limits of Paradise, is known to all;[179] and yet in Mesopotamia, and in Egypt, to which countries those rivers extended, there is not found that blessedness of life which is recorded in Paradise. Accordingly, though the waters of Paradise are found beyond its boundaries, yet its happiness is in Paradise alone. So, therefore, the baptism of the Church may exist outside, but the gift of the life of happiness is found alone within the Church, which has been founded on a rock, which has received the keys of binding and loosing.[180] "She it is alone who holds as her privilege the whole power of her Bridegroom and Lord;" by virtue of which power as bride, she can bring forth sons even of handmaids. And these, if they be not high-minded, shall be called into the lot of the inheritance; but if they be high-minded, they shall remain outside. * * * * * CHAP. II.--2. All the more, then, because we are fighting for the honour and unity of the Church, let us beware of giving to heretics the credit of whatever we acknowledge among them as belonging to the Church; but let us teach them by argument, that what they possess that is derived from unity is of no efficacy to their salvation, unless they shall return to that same unity. For "the water of the Church is full of faith, and salvation, and holiness" to those who use it rightly. No one, however, can use it well outside the Church. But to those who use it perversely, whether within or without the Church, it is employed to work punishment, and does not conduce to their reward. And so baptism "cannot be corrupted and polluted," though it be handled by the corrupt or by adulterers, just as also "the Church herself is uncorrupt, and pure, and chaste." And so no share in it belongs to the avaricious, or thieves, or usurers,--many of whom, by the testimony of Cyprian himself in many places of his letters, exist not only without, but actually within the Church,--and yet they both are baptized and do baptize, with no change in their hearts.