Suhruwardi's philosophy grants an epistemological role to immediate and atemporal intuition. It is explicitly anti-Peripatetic and is identified with the pre-Aristotelian sages, particularly Plato. The subject of his hikmat al-Ishraq—now available for the first time in English—is the "science of lights," a science that Suhrawardi first learned through mystical exercises reinforced later by logical proofs and confirmed by what he saw as the parallel experiences of the Ancients. It was completed on 15 September 1186; and at sunset that evening, in the western sky, the sun, the moon, and the five visible planets came together in a magnificent conjunction in the constellation of Libra. The stars soon turned against Suhrawardi, however, who was reluctantly put to death by the son of Saladin, the sultan of Egypt, in 1191.

Shihäb al-Din al-Suhrawardi was born around 1154, probably in northwestern Iran. Spurred by a dream in which Aristotle appeared to him, he rejected the Avicennan Peripatetic philosophy of his youth and undertook the task of reviving the philosophical tradition of the "Ancients."