the methods of Greek philosophy had already debated this matter, and in their hands it had taken the form of the question, "how many, and what, attributes are compatible with the unity of God?" If God's wisdom, whether expressed in the Qur'an or not expressed, were eternal there was something which God possessed, and consequently something other than God which was equal to him in eternity and was not created by him, so that it could not be said that God was alone and that all other things proceeded from him as their cause as the eternal quality always was side by side with God, and so Wasil b. 'Ata declared "he who affirms an eternal quality beside God, affirms two gods." But this applies equally to all qualities, justice, mercy, etc., and, as was suggested by the study of Aristotle, all the categories, all that could be predicated of God as subject, were either created by God and so were not essential and eternal attributes, or else were external things equal with God.
The second generation of Mu'tazilites, of those who begin to show direct acquaintance with Greek philosophy, begins with Abu l-Hudayl al- Allaf of Basra (d. 226 A.H.), who lived at the time when Greek philosophy was beginning to be studied with great ardour and was received without question. He admits the attributes of God and regards them as eternal, but treats them on lines very similar to those employed by the Christians in dealing with the divine hypostases, that is to say, they are not external things