With Paul the spiritual sense of Scripture is based on the historical, is in fact the moral content and import thereof; for he sees in history a continuous manifestation of God's will. With the Allegorists the spiritual sense, arrived at by _à priori_ means, replaces the historical, destroyed to make room for it. The Apostle points out in the story of Hagar a spiritual intent, such as exists in every scene of human life if we had eyes to see it, something other than the literal relation of the facts, but nowise alien from it. Here lies the difference between legitimate and illegitimate allegory. The utmost freedom may be given to this employment of the imagination, so long as it is true to the _moral_ of the narrative which it applies. In principle the Pauline allegory does not differ from the type. In the type the correspondence of the sign and thing signified centres in a single figure or event; in such an allegory as this it is extended to a group of figures and a series of events. But the force of the application depends on the actuality of the original story, which in the illicit allegory is matter of indifference. "Which things are allegorized"--so the Apostle literally writes in ver. 24--_made matters of allegory_. The phrase intimates, as Bishop Lightfoot suggests, that the Hagarene episode in Genesis (ch. xvi., xxi. 1-21) was commonly interpreted in a figurative way. The Galatians had heard from their Jewish teachers specimens of this popular mode of exposition. Paul will employ it too; and will give his own reading of the famous story of Ishmael and Isaac. Philo of Alexandria, the greatest allegorist of the day, has expounded the same history. These eminent interpreters both make Sarah the mother of the spiritual, Hagar of the worldly offspring; both point out how the barren is exalted over the fruitful wife. So far, we may imagine, Paul is moving on the accepted lines of Jewish exegesis. But Philo knows nothing of the correspondence between Isaac and _Christ_, which lies at the back of the Apostle's allegory. And there is this vital difference of method between the two divines, that whereas Paul's comparison is the illustration of a doctrine proved on other grounds--the painting which decorates the house already built (Luther)--with the Alexandrine idealist it forms the substance and staple of his teaching. Under this allegorical dress the Apostle expounds once more his doctrine, already inculcated, of the difference between the Legal and Christian state. The former constitutes, as he now puts the matter, a bastard sonship like that of Ishmael, conferring only an external and provisional tenure in the Abrahamic inheritance. It is contrasted with the spiritual sonship of the true Israel in the following respects:--It is a state of _nature_ as opposed to grace; of _bondage_ as opposed to freedom; and further, it is _temporary_ and soon to be ended by the Divine decree.