Iqbal takes up qiyās — the fourth and final source — and through it delivers the closing verdict of the entire Reconstruction: the closure of the door of ijtihād is 'pure fiction,' sustained by intellectual laziness 'which, especially in the period of spiritual decay, turns great thinkers into idols.' He calls the Muslim world to courageously proceed with reconstruction, and names Islam's ultimate aim as a spiritual democracy grounded in the principles of Tawḥīd.
Section 13 examined the third source of Islamic law — ijmāʿ — and argued for its transformation from a theoretical concept into a functioning legislative assembly, with the ʿulamāʾ participating as contributors rather than gatekeepers, and legal education reform as the institutional precondition. Section 14 now takes up the fourth and final source — qiyās (analogical reasoning) — and through it delivers the closing argument of the entire Reconstruction: the declaration that the closure of ijtihād is a 'pure fiction,' the call for the Muslim world to 'courageously proceed to the work of reconstruction,' and Iqbal's vision of Islam's ultimate aim — a 'spiritual democracy' that the modern Muslim is uniquely positioned to build.
The section advances through four movements. First, Iqbal traces the historical controversy between the Iraqi school of Abū Ḥanīfah (which emphasised deductive analogical reasoning) and the Ḥijāzī school of Mālik and al-Shāfiʿī (which insisted on the primacy of concrete precedent). Iqbal reads this controversy not as a sectarian dispute but as a productive dialectic: the Ḥijāzī critique 'emancipated the concrete' and forced the Ḥanafī school to integrate inductive sensitivity into its deductive method, producing a school that is 'absolutely free in its essential principle and possesses much greater power of creative adaptation than any other school.' Second, Iqbal identifies the irony that modern Ḥanafī legists have 'eternalized the interpretations of the founder' — committing exactly the same error that the early critics of Abū Ḥanīfah committed with regard to concrete precedents. The essential principle of qiyās, rightly understood, is 'only another name for ijtihād.'
Third, Iqbal delivers the verdict: 'The closing of the door of ijtihād is pure fiction suggested partly by the crystallization of legal thought in Islam, and partly by that intellectual laziness which, especially in the period of spiritual decay, turns great thinkers into idols.' He cites al-Zarkashī's eighth-century observation that ijtihād is easier for later scholars than for earlier ones, given the vastly greater body of compiled material available to them. Fourth, and most powerfully, Iqbal closes the entire Reconstruction with a vision of Islam's civilisational purpose: humanity needs 'a spiritual interpretation of the universe, spiritual emancipation of the individual, and basic principles of a universal import directing the evolution of human society on a spiritual basis.' Europe has failed to provide these because 'pure thought has so little influenced men, while religion has always elevated individuals, and transformed whole societies.' The Muslim world, in possession of 'these ultimate ideas on the basis of a revelation,' has the resources to build what Europe cannot — provided it reconstructs its social life 'in the light of ultimate principles' and evolves 'that spiritual democracy which is the ultimate aim of Islam.'
This closing section brings the entire arc of the Reconstruction to its destination. The seven lectures have moved from the metaphysical foundations (Lectures I–II), through epistemology (Lecture III), the nature of selfhood and prayer (Lecture IV), the anti-classical spirit of Muslim culture (Lecture V), to the question of institutional movement (Lecture VI). The final paragraphs reveal that this entire journey was in service of a single imperative: the reconstruction of Islamic civilisation as a 'spiritual democracy' — a society constituted not by ethnic solidarity, monarchical authority, or clerical supervision, but by the free, creative, spiritually grounded self-governance of a people who have internalised the principles of Tawḥīd.