But philosophy as such was not Albo's forte, nor was it his chief interest. While it is true that all the Jewish thinkers of the middle ages were for a great part apologetes, this did not prevent a Maimonides or a Gersonides from making a really thorough and disinterested study of science and philosophy; and often their scientific and philosophic conviction was so strong that the apologia was pro philosophia sua rather than pro Judaismo. The central theme therefore in the majority of Albo's philosophical predecessors was the equally metaphysical and theological, of God and his attributes. These were proved by reason and confirmed by Scripture and tradition. Judaism had to be formulated and defended with a view not so much to the dangers threatening from Christianity and Mohammedanism as to those endangering all religions alike, namely, the opinions of science and philosophy as taught especially by the Aristotelians. Hence Maimonides treated for the most part of the same problems as the Mohammedan Mutakallimun before him, and Thomas Aquinas the Christian had no scruple in making the Jewish philosopher's method his own when he undertook to defend the Catholic faith "contra Gentiles."
Different were the circumstances as well as the attitude of Joseph Albo. The purely philosophic interest was not strong in his day. He was not confronted by the necessity of proving the existence and incorporeality of God by reason. No one doubted these things and they had been abundantly written about in times gone by. In the interest of completeness and for the benefit of those who were not trained in technical philosophy, Albo found it desirable to restate the results of previous discussions of these topics in a style more accessible to the readers of his day. But the central interest in his age was shifted. It was a time of religious disputations and forced conversions. Albo himself had taken part in such a disputation held at Tortosa in 1413-14, and he had to defend Judaism against Christianity. He had to show his own people that Judaism was the true religion and Christianity spurious. Hence it was religion as such he had to investigate, in order to find what marks distinguished a divine law from a human, and a genuine divine law from one that pretended to be such. To make this investigation logically complete he had to show that there must be such a thing as a divine law, and that no such law can be conceived without assuming certain basal beliefs or dogmas. A discussion of religious dogma was essential, for upon the nature of these fundamental beliefs depended one's judgment of a given law and its character as divine or human, genuine or spurious. Hence the title of Albo's treatise, "Book of [religious] Roots [dogmas]." And while it is true that Maimonides, the systematizer and codifier, could not fail to put down in his commentary on the Mishna a list of articles of the Jewish creed, nothing is said of this in his philosophical work, the "Guide of the Perplexed." With Albo the establishment of the fundamental dogmas is the central theme.
At the same time Albo was anticipated even in this, his more original contribution. Crescas, his teacher, had written, beside the "Or Adonai," a work against Christianity.[404] And in the "Or Adonai" itself he devotes considerable space to the question of the fundamental dogmas of Judaism, and takes occasion to criticize Maimonides for his faulty method in the selection of the thirteen articles, on the ground that he did not distinguish between what was fundamental and what was derivative. This suggestion gave Albo his cue, which he developed in his own way.[404a]
Human happiness, Albo tells us, depends upon theory and practice, as Aristotle says. But the human mind is inadequate to know by itself the truth touching these two. Hence there is need of something superior to the human mind which will define right practice and the true ideas. This can be only by divine guidance. Hence everyone must be able to tell the divine legislation from those which are not divine. For this it is necessary to know what are the principles without which a divine law cannot exist. This is the purpose of the book, to explain the essential principles of a divine law.[405]
A knowledge of the principles of religion would seem easy, for all people profess some religion or other, and hence are presumed to know upon what their religions are based. But this question has not been treated adequately before, and there is no agreement among previous writers about the number of the principles or their identity. Some say there are thirteen (Maimonides), some say twenty-six, some six (Crescas), without investigating what are the principles of divine religion generally. For we must distinguish between the general principles which pertain to divine legislation as such and hence are common to all religions, and special principles which are peculiar to a particular religion.
Seeing the importance of this subject, Albo continues, I undertook this investigation. I came to the conclusion that there are three general principles of divine religion, existence of God, Revelation, and Reward and Punishment after death. Then there are special principles peculiar to a particular religion. From the general principles ("Ikkarim") follow particular or derivative principles ("Shorashim.")[406]
The investigation of the principles of religion is a delicate matter because one is in danger of being reckoned an infidel if he denies what is considered by others a fundamental dogma. Thus according to Maimonides the belief in the Messiah is fundamental, and he who denies it is a heretic and has no share in the world to come. And yet Rabbi Hillel in the Talmud (Sanhedrin, 99a) said, "Israel need expect no Messiah, for they had the benefit of one in the days of Hezekiah, King of Judah." On the other hand, Maimonides does not regard creation ex nihilo as fundamental, whereas others do; and to their mind Maimonides is open to the charge of unbelief.
The truth is that only he is an unbeliever who deliberately and knowingly contradicts the Bible. A person who believes in the Bible but is led mistakenly to misinterpret it, and denies real principles because he thinks the Bible does not require us to believe them as principles, or does not require us to believe them at all, is guilty of error and in need of forgiveness, but is not a heretic.[407]
Having thus defined his attitude and purpose, Albo proceeds to criticize the list of dogmas laid down by Maimonides and modified by Crescas, and then defends his own view. A fundamental principle ("Ikkar," lit. root) is one upon which something else depends and without which this latter cannot exist. Maimonides counts thirteen principles of Judaism as follows: (1) Existence of God, (2) Unity, (3) Incorporeality, (4) Eternity, (5) He alone must be worshipped, (6) Prophecy, (7) Superiority of the prophecy of Moses, (8) Revelation, (9) Immutability of the Law, (10) God's Omniscience, (11) Reward and Punishment, (12) Messiah, (13) Resurrection.[408] This list is open to criticism. If Maimonides intended to admit strict principles only without which Judaism cannot exist, we understand why he named (1), (6), (8), (10), (11), which are general principles of any divine religion, and (7) and (9) as special principles of Judaism. But we cannot see why he included (2) and (3). For while they are true, and every Jew should believe them, Judaism can be conceived as existing without them. It is still more strange that (5) should be counted as a principle. To be sure, it is one of the ten commandments, "Thou shalt have no other Gods before me.... Thou shalt not bow thyself down to them, nor serve them" ... (Exod. 20, 35), but Judaism can be conceived to exist even with the belief in a mediator. Similarly it is not clear why (13) should be considered as a fundamental dogma. On the other hand, he omitted Tradition and Free Will as beliefs essential to any divine religion.
If, in defence of Maimonides, we say that he intended to name not only fundamental principles, but also true beliefs, whether fundamental or derivative, then there are many others he might have mentioned, such as creation ex nihilo, belief in miracles, that God rests in Israel through the Torah, and so on.