38. It is said love of the sex and conjugial love, because love of the sex is different from conjugial love. Love of the sex dwells with the natural man, but conjugial love with the spiritual. The natural man loves and desires only external conjunctions, and from these, the pleasures of the body; but the spiritual man loves and desires internal conjunction and from this, the happiness of the spirit. Moreover, he perceives that this happiness is possible [only] with one wife, with whom he can be perpetually more and more conjoined into a one. And the more he is thus conjoined, the more he perceives his happiness ascending in like degree and remaining constant to eternity; but of this, the natural man has no thought. Hence it is said that conjugial love remains after death with those who come into heaven, being those who become spiritual on earth.