to act "According to the law which they shall teach thee, and according to the judgment which they shall tell thee thou shalt do." (Deuteronomy 17:11). They assert in wicked defiance that they believe most firmly in the prophecy of Moses, as the Arabs and Byzantines say, yet they destroy and nullify his law and kill the adherents thereof. Whoever joins them is just like his seducer. We deemed it imperative to call your attention to these facts, and to raise the young generation on these tenets, because they are a pillar of faith!
In your letter you have adverted to the computations of the date of the Redemption and R. Saadia's opinion on the subject. First of all, it devolves upon you to know that no human being will ever be able to determine it precisely as Daniel has already intimated, "For the words are shut up and sealed." (Daniel 12:9). Indeed many hypotheses were advanced by scholars, who fancied that they have discovered the date, as was anticipated in Scripture, "Many will run to and fro, and opinions shall be increased." (Daniel 12:9). That is, there shall be numerous views concerning it. Furthermore we have a Divine communication through the medium of the prophets that many persons will calculate the time of the advent of the Messiah but will fail to ascertain its true date. We are cautioned against giving way to doubt and distrust because of these miscalculations. The longer the delay, the more fervently shall you hope, as it is written, "And it declareth of the end and doth not lie, though it tarry, wait for it, because it will surely come, it will not delay." (Habakkuk 2:3).
Remember that even the date of the termination of the Egyptian Exile was not precisely known and gave rise to differences of opinion, although its duration was fixed in Scripture, where we read, "and they shall serve them and afflict them four hundred years" (Genesis 15:13). Some reckoned the period of four hundred years from the time of Jacob's arrival in Egypt, others dated it from the beginning of Israel's bondage, which happened seventy years later, while still others computed it from the time of the Covenant of the Pieces when this matter was Divinely predicted to Abraham. At the expiration of four hundred years after this event, and thirty years before the appearance of Moses, a band of Israelites left Egypt because they believed that exile had ended for them. They were subdued and slain by the Egyptians. The lot of the Israelites who remained was consequently aggravated as we learn from our sages, the teachers of our national traditions. David already alluded to the vanquished Israelites who miscalculated the date of the redemption in the verse, "The children of Ephraim were as archers handling the bow that turned back in the day of battle" (Psalms 78:9).
In truth, the period of four hundred years commences with the birth of Isaac the seed of Abraham, par excellence, as may be gathered from the verse, "For in Isaac shall seed be called to thee" (Genesis 21:12), and the verse, "Thy seed shall be a stranger in a land that is not theirs, they shall serve them, and afflict them four hundred years" (Genesis 15:13). In exile, they would rule, enslave and maltreat them, this is the implication of this text. The four hundred years mentioned in this verse refer to the duration of the exile, and not [solely] to the Egyptian bondage. This fact was misunderstood until the great prophet (Moses) came, when it was realized that the four hundred years mentioned in this verse refer to the duration of the exile, and not [solely] to the Egyptian bondage. This fact was misunderstood until the great prophet (Moses) came, when it was realized that the four hundred years dates back precisely to the birth of Isaac. Now, if so much uncertainty prevailed in regard to the date of the emancipation from Egyptian bondage, the term of which was fixed, how much more would it be the case in respect to the date of the final redemption, the prolonged and protracted duration of which appalled and dismayed our inspired seers, so that one of them was moved to exclaim, "Wilt Thou be angry with us forever? Wilt Thou draw out Thine anger to all generations?" (Psalms 85:6). Isaiah, too, alluding to the long drawn out exile, declared: "And they shall be gathered together as prisoners are gathered in the dungeon, and shall be shut up in prison, and after many days shall they be released" (24:22). Inasmuch as Daniel has proclaimed the matter a deep secret, our sages have interdicted the calculation of the time of the future redemption, or the reckoning of the period of the advent of the Messiah, because the masses might be mystified and bewildered should the Messiah fail to appear as forecast. The rabbis invoked God to frustrate and destroy those who seek to determine prescisely the advent of the Messiah, because the masses might be mystified and bewildered should the Messiah fail to appear as forecast. The rabbis invoked God to frustrate and destroy those who seek to determine precisely the advent of the Messianic era, because they are a stumbling block to the people, and that is why they uttered the imprecation "May the calculators of the final redemption come to grief" (Sanhedrin 97b).
As for R. Saadia's Messianic calculations, there are extenuating circumstances for them though he knew they were disallowed. For the Jews of his time were perplexed and misguided. The Divine religion might well nigh have disappeared had he not encouraged the pusillanimous, and diffused, disseminated and propagated by word of mouth and pen a knowledge of its underlying principles. He believed, in all earnestness, that by means of the Messianic calculations, he would inspire the masses with hope for the truth. Verily all