Catholic Commentary
The Three Signs Given to Moses (Part 1)
1Moses answered, “But, behold, they will not believe me, nor listen to my voice; for they will say, ‘Yahweh has not appeared to you.’”2Yahweh said to him, “What is that in your hand?”3He said, “Throw it on the ground.”4Yahweh said to Moses, “Stretch out your hand, and take it by the tail.”5“This is so that they may believe that Yahweh, the God of their fathers, the God of Abraham, the God of Isaac, and the God of Jacob, has appeared to you.”6Yahweh said furthermore to him, “Now put your hand inside your cloak.”7He said, “Put your hand inside your cloak again.”8“It will happen, if they will not believe you or listen to the voice of the first sign, that they will believe the voice of the latter sign.
God does not rebuke doubt—he hands Moses concrete, escalating proofs, teaching us that authentic faith is not blind but patient and specific.
Doubting that Israel will accept his divine commission, Moses voices his fear of rejection before Yahweh, who responds not with rebuke but with three authenticating signs. The first two—the staff transformed into a serpent and the hand struck with leprosy then healed—are given here, each designed to escalate faith in the one who has truly spoken with God. The passage reveals a God who meets human weakness with patient, concrete proof, equipping Moses step by step for a mission Moses himself does not yet trust he can accomplish.
Verse 1 — Moses's Objection: The Fear of Disbelief Moses's protest, "They will not believe me," is his second major objection in this theophany (cf. 3:11, 3:13). The Hebrew verb āman (to believe, trust, find reliable) is the same root from which "Amen" derives—emphasizing that what is at stake is not merely intellectual assent but covenantal trust. Moses is not being cynical; his fear is historically grounded. An enslaved people, crushed under generations of bondage, had every experiential reason to distrust another promised deliverer. Notably, his concern is entirely for his audience, not for himself—a subtle mark of pastoral instinct even in his reluctance.
Verse 2 — "What is that in your hand?" Yahweh does not explain himself or argue the case; he redirects Moses's attention to what Moses already holds. The matteh (staff or rod) is the tool of a shepherd—Moses's current and humble vocation. It is an instrument of guidance, support, and authority in pastoral life. By asking what is already in Moses's hand, God signals a pattern that runs throughout Scripture and salvation history: the divine does not bypass the human instrument but transfigures it. What is ordinary becomes the locus of the extraordinary.
Verses 3–4 — The Staff Becomes a Serpent, Then a Staff Again Moses throws the staff down and it becomes a nāḥāsh (serpent), causing Moses to flee—the same word used for the serpent in Eden (Gen 3:1). This is not incidental. Moses is then commanded to grasp it by the tail, the most dangerous way to handle a serpent (the head being the point of strike), an act that requires trust in the divine command over instinctual self-preservation. When he grasps it, it returns to a staff. The Egyptian context is also crucial: serpent imagery (uraeus) was the supreme symbol of Pharaoh's power and divine protection. The sign thus anticipates the confrontation to come: the power behind Moses's rod will overcome the power of Pharaoh's throne.
Verse 5 — The Explicit Purpose: Covenant Memory as the Grounds of Belief God himself interprets the sign: it is so that Israel will believe that "the God of Abraham, the God of Isaac, and the God of Jacob" has appeared. The triple patriarchal formula—already established at the burning bush (3:6)—grounds the new act of salvation in the continuity of covenant. God is not new; his intervention is the fulfillment of pledges made generations before. Faith is invited not into the unknown but into the trustworthy record of divine fidelity.
Verses 6–7 — The Leprous Hand: Life Through Death Moses inserts his hand into his cloak (, literally "bosom"), and it emerges white as snow with (the biblical condition often translated leprosy, but encompassing various severe skin disorders). Reinserted, it is restored to health. Unlike the staff-sign, which is performed outwardly, this sign is enacted on Moses's own body—it is intensely personal. In Israelite understanding, was associated with ritual death, exclusion from community, and divine judgment (cf. Num 12:10–12, where Miriam is struck leprous for challenging Moses's authority). The restoration of the hand thus enacts in miniature the power of God over death and exclusion—a preview of the redemption he is about to accomplish for all Israel.
Catholic tradition reads this passage on multiple levels. At the literal level, it demonstrates that God accommodates himself to human weakness—what the Catechism calls condescension (CCC 684, cf. 101–102 on divine accommodation in Scripture). God does not demand faith in a vacuum; he furnishes evidence calibrated to the capacity of his hearers.
Typologically, the Church Fathers found rich prefigurations here. St. Augustine (City of God, X.8) and later the medieval tradition read the serpent-staff sign as a figure of Christ: the eternal Word (the staff of divine authority) taking on fallen human nature (the serpent, recalling Adam's transgression), then being "grasped"—that is, raised on the cross—and restored to life as the instrument of salvation. Origen (Homilies on Exodus, IV) sees in Moses's reluctance a figure of the prophetic vocation itself: the genuine prophet does not rush forward but must be equipped and authenticated by God.
The leprous hand restored is read by several Fathers as a type of baptism: the hand thrust into darkness (the ḥêq, "bosom," sometimes interpreted as descent into the waters of death) and emerging purified. St. Cyril of Alexandria explicitly connects this to the paschal mystery—corruption entered, incorruption emerged.
The Catechism's treatment of miracles as "signs" (CCC 548) is directly illuminated here: signs are not brute proofs coercing the intellect, but invitations addressed to freedom, requiring the cooperation of the will. God gives Moses tools for persuasion, not magic tricks; the same structure governs every miracle of Christ. The triple patriarchal formula in verse 5 also grounds Catholic understanding of Tradition: the God who speaks now is identified through the living memory of covenant—a reminder that Scripture cannot be severed from the community that received it (CCC 80–83).
Contemporary Catholics will recognize themselves in Moses's first word: "But." The objection of inadequacy—"they won't believe me, they won't listen"—is the interior script of anyone who has ever felt called to speak about faith in a secular workplace, to evangelize a cynical family member, or to step forward in ministry despite feeling unqualified. God's response is instructive in its specificity: he does not offer abstract encouragement but asks, concretely, what is already in your hand?
Every Catholic has something in hand—a vocation, a skill, a story, a suffering already endured. The passage invites examination of what ordinary instrument God may wish to transfigure for his purposes. The graduated signs also speak to the pastoral challenge of evangelization: not every person is moved by the same argument or witness. The Church's tradition of inculturation and apologetics—meeting people where they are—is rooted in exactly this divine pedagogy. Finally, the leprous hand sign challenges complacency: authentic mission sometimes requires allowing God to work on us visibly, not only through us.
Verse 8 — Escalating Signs and the Pedagogy of Faith The phrase "the voice of the sign" (qōl hā-ʾôt) is striking: signs are described as having a "voice," a communicative, quasi-verbal character. God pedagogically calibrates the persuasion: should the first sign fail, the second is offered; a third (water to blood, vv. 9) follows. This graduated structure reflects a divine patience and a theology of progressive revelation—God does not overwhelm but invites, step by step, into deeper trust.