al-andalus al-ghazali alchemy algiers allah almagest aloys sprenger angel ape arab arabic language aristotle arithmetic astrology astronomy bbc barbarian basra beirut berlin brahmin brethren of purity charles darwin classical element common era coral darwinism decimal system dialectic didacticism eclecticism ecumenism efficient cause eliot weinberger empedocles encyclopedia energy english language enneads epistles euclid evolution fable female geometry gnosticism god grammatical person greek philosophy hamid al-din al-kirmani hanbali hashshashin hermes hermes trismegistus hermetic hinduism hindustani human ibn arabi ibn miskawayh internet encyclopedia of philosophy iraq islam ismaili jorge luis borges judaism logic magic square male man maslamah ibn ahmad al-majriti matter mineral muhammad hamidullah music muslim world natural science neoplatonism nicomachus numerology pantheism persian language planet platonic idealism plotinus prophet ptolemy pythagoras robert irwin saint socrates spain square number stanley lane-poole substance theory sufism sunna transcript transmigration of the soul treatise tree turkish language vegetation water wikimedia commons yemen