 Let theism in general be the belief that a supremely powerful, supremely wise, and supremely good (loving, just, merciful) personal being exists as the Creator of the universe. Christian theism is, of course, more specific than that, and Christian theists typically make the following two-fold assumption: first, that the highest possible good for created persons (true blessedness, if you will) requires that they enter into a proper relationship (or even a kind of union) with their Creator, and second, that a complete severance from the divine nature, without even an implicit experience of God (see  note 11)  would be a terrifying evil. As C. S. Lewis once put it, union with the divine “Nature is bliss and separation from it [an objective] horror” (1955, 232). Although most Christians would probably agree with this, some may want additional clarity on the nature of the union and the separation in question here. But in any case, whereas heaven is in general thought of as a realm in which people experience the bliss of perfect fellowship and harmony with God and with each other, hell is in general thought of as a realm in which people experience the greatest possible estrangement from God, the greatest possible sense of alienation, and perhaps also an intense hatred of everyone including themselves.