Mishneh Torah, Foundations of the Torah 1

Hook

Ever considered that God's existence isn't just a fact, but the foundational necessity, without which nothing else could possibly exist? This isn't just a theological claim, but a rigorous philosophical one.

Context

Maimonides, the Rambam, in his monumental legal code, Mishneh Torah, begins not with narrative or law, but with metaphysics. This reflects his broader project of integrating classical Aristotelian philosophy with Jewish tradition, using rigorous logic to articulate core beliefs and ground halakha in intellectual apprehension of the divine.

Text Snapshot

"The foundation of all foundations and the pillar of wisdom is to know that there is a Primary Being who brought into being all existence. All the beings of the heavens, the earth, and what is between them came into existence only from the truth of His being. If one would imagine that He does not exist, no other being could possibly exist." (Mishneh Torah, Foundations of the Torah 1:1, https://www.sefaria.org/Mishneh_Torah%2C_Foundations_of_the_Torah_1)

Close Reading

Insight 1: Foundational Structure

Rambam doesn't start with commandments or stories, but with knowledge—"to know that there is a Primary Being." This immediately frames the entire Torah as built upon an intellectual apprehension of God's nature, not just blind faith. This isn't a suggestion; it's explicitly stated as the "foundation of all foundations and the pillar of wisdom."

Insight 2: Key Term: "Primary Being" (מצוי ראשון)

The commentary (Peirush on Mishneh Torah, Foundations of the Torah 1:1:2) clarifies "Primary Being" as "מחוייב המציאות" – a "Necessary Existent." This means God's existence isn't contingent or dependent on anything else; it is His very essence. In contrast, all other existence is "אפשרי המציאות" – possible, but not necessary, and therefore dependent on Him.

Insight 3: The Asymmetry of Existence

The passage highlights a radical asymmetry: "If one would imagine that He does not exist, no other being could possibly exist. If one would imagine that none of the entities aside from Him exist, He alone would continue to exist." This illustrates that God is the sole necessary condition for all reality, while Himself requiring no conditions whatsoever.

Two Angles

Commentators grapple with the halakhic status of this fundamental knowledge. Rambam, in his Sefer HaMitzvot (and supported by Rashi's reading of Horayot 8a, according to Yitzchak Yeranen), identifies "I am the Lord your God" (Exodus 20:2) as the first positive commandment – an obligation to know and believe in God's existence. In contrast, Ba'al Halachot Gedolot (Behag), as discussed in Yitzchak Yeranen, views "אנכי" not as a distinct commandment among the 613, but as a foundational principle, an acceptance of God's kingship that precedes and enables all other mitzvot. This shifts the emphasis from an active "doing" of belief to a prerequisite "receiving" of sovereignty.

Practice Implication

If, as Rambam holds, the very knowledge of God's existence is a positive commandment, then intellectual inquiry, philosophical study, and deep contemplation of God's nature become acts of worship and fulfillment of mitzvah, not just academic exercises.

Chevruta Mini

1. Is the philosophical proof for God's necessary existence more or less compelling than accepting it through tradition/קבלה? What are the tradeoffs of each approach for faith?
2. If God is truly a "Necessary Existent," how does this square with the idea of free will and human choice? Does His necessity imply a predetermined reality?

Takeaway

God's existence is not merely a belief, but the unique, necessary truth from which all other reality derives its very possibility.