Emanuel Swedenborg, Heaven and Hell — Chapter XLIV, What the World of Spirits is
“ To the extent, therefore, that the truths of the understanding and the goods of the will are conjoined, that is, to the extent that a man wills truths and does them from his will, he has heaven in himself, since the conjunction of good and truth, as just said, is heaven. And on the other hand, just to the extent that the falsities of the understanding and the evils of the will are conjoined man has hell in himself, since the conjunction of falsity and evil is hell. But so long as the truths of the understanding and the goods of the will are not conjoined man is in an intermediate state. ”
