Iqbal turns the Ash'arite system against its own conclusion: the fundamental unit of reality is not the material atom but the psychic act, and reality is therefore essentially spirit organised in degrees. From the Ultimate Ego only egos proceed — and human self-consciousness is the highest degree of reality available to creation.
Section 4 laid out the architecture of Ash'arite atomism: a world of indivisible atoms (jawāhir) that are not self-subsisting substances but discrete pulses of divine creative energy, each receiving existence from God at every moment. That section answered the structural question — what is the world made of? Section 5 now confronts the dynamic question: if atoms have position but no magnitude, and space is generated only by their aggregation, how is motion possible? And what sustains the atom in existence from one moment to the next?
The section advances through four major movements, each building on the last and each raising the stakes of Iqbal's argument.
The first movement addresses the problem of motion in discrete space. If space is not a continuous backdrop but an emergent product of atomic aggregation, then the classical picture of a body gliding smoothly through space is incoherent. The Muʿtazilite thinker al-Naẓẓām proposed the concept of ṭafrah (jump): a moving body does not pass through all the intervening positions between its start and destination but leaps from one discrete position to the next. Iqbal confesses he does not entirely understand this solution, but he immediately notes that modern physics — specifically Planck's quantum theory as interpreted by Whitehead — has arrived at the same difficulty and proposed a structurally identical solution: the electron does not continuously traverse its path but appears at a series of discrete positions.
The second movement introduces the doctrine of accidents (aʿrāḍ): qualities such as life, death, motion, and rest that are perpetually created by God and on which the atom's continued existence depends. Two propositions follow: nothing has a stable nature, and the soul (nafs) is either a finer kind of matter or merely an accident. Iqbal accepts the first proposition as genuinely faithful to the Qur'anic spirit of continuous creation and calls on future theologians to reconstruct the Ash'arite theory in contact with modern science.
The third movement is the section's philosophical pivot. Iqbal rejects the second proposition — that the soul is an accident — and turns the Ash'arite system against its own conclusion. If the atom's continuity depends on the perpetual creation of accidents, and if motion is inconceivable without time, and if time itself derives from psychic life, then it is not the atom that is fundamental but the nafs — the psychic act. The body is merely the act become visible. Iqbal argues that the Ash'arites vaguely anticipated the modern notion of the point-instant but failed to see that the instant (the temporal, psychic element) is more fundamental than the point (the spatial, material element). In a decisive judgement, he declares Rūmī more faithful to the spirit of Islam than Ghazālī on this question.
The fourth movement draws the metaphysical consequence: reality is essentially spirit, and there are degrees of spirit. Iqbal traces the idea of degrees of reality through Suhrawardī Maqtūl, Hegel, and Haldane, then arrives at his own central doctrine: the Ultimate Reality is an Ego, and from this Ultimate Ego only egos proceed. Every atom of divine energy is an ego; but egohood admits of degrees, rising from the mechanical movement of matter to its perfection in human self-consciousness. Man alone, of all God's creations, is capable of consciously participating in the creative life of his Maker — and it is this capacity that constitutes his unique dignity and reality.
The section is the hinge of Lecture III. Everything before it has been exposition and critique of the Ash'arite system. Everything after it will work within the framework that this section establishes: a spiritual pluralism grounded in the concept of the ego, in which the degree of reality of any entity is determined by the degree to which it is conscious of its own existence. This is the metaphysical core of Iqbal's entire philosophy — the doctrine of Khudi translated into cosmological terms.
‘is to assume that an electron does not continuously traverse its path in space. The alternative notion as to its mode of existence is that it appears at a series of discrete positions in space which it occupies for successive durations of time. It is as though an automobile, moving at the average rate of thirty miles an hour along a road, did not traverse the road continuously, but appeared successively at the successive milestones, remaining for two minutes at each milestone.’