At Oxford, Nusseibeh met Lucy Austin, the daughter of British philosopher J.L. Austin, and future founder of the NGO MEND. They were married in late 1973 by the Grand Mufti of Jerusalem, Sheikh Saad al-Din Jalal al-Alami, and their marriage gave them four children: three sons, Jamal, Absal, Buraq, and one daughter, Nuzha.[21] While at Oxford Sari was much drawn to the linguistic philosophy introduced by Ludwig Wittgenstein and developed by Austin. After completing his Oxford degree, he spent a year at the Warburg Institute in London, after hearing a lecture by Abdulhamid Sabra which attracted him to the study of the early Islamic school of Mu'tazilite logicians, the thought of Al-Ghazali and the subsequent discursive victory of the latter, as formulated by the Ash'ari school of theologians.[22]