For all the calamity that was ever to befall the Jewish nation is expressly said to bear no sensible proportion to their subsequent prosperity: whereas, their prosperity has hitherto borne a small proportion to their calamity; so that had Abraham really foreseen the fate of his posterity, he would on this idea, have had little reason to rejoice in the prospect.
It may be said, that the prosperity of the descendants of Abraham, was to depend on a condition, viz., their obedience, and that this condition was not fulfilled.

But, besides that the Divine Being must have foreseen this circumstance, and therefore must have known that he was only tantalizing Abraham with a promise which would never be accomplished; this disobedience, and the consequences of it are expressly mentioned by Moses, and the other Prophets, only as a temporary thing, and what was to be succeeded by an effectual repentance, and perpetual obedience, and prosperity.
Among others, let the following prophecy of Isaiah (in which the future security of Israel is compared to the security of the world from a second deluge) be considered, and let any impartial person say, whether the language does not necessarily lead those who believe the Old Testament, to the expectation of a much more durable state of Glory, and Happiness, than has, as yet, fallen to the lot of the posterity of Abraham.
Is.

54, 7.

"For a small moment have I forsaken thee, but with great mercies will I gather thee.

In a little wrath I hid my face from thee for a moment, but with everlasting kindness will I have mercy on thee, saith the Lord, thy Redeemer.