747. That “two and two” signify things that correspond, anyone may see from their being pairs; they cannot be pairs unless they correspond to each other, as do goods and truths, and evils and falsities. For there is in all things a semblance of a marriage, or a coupling, as of truths with goods, and of evils with falsities, because there is a marriage of the understanding with the will, or of the things of the understanding with those of the will. And indeed everything has its marriage or its coupling, without which it could not possibly subsist.