He wrote a critique of Aristotelian philosophy and Aristotelian physics entitled "Kitab al-Mu'tabar" (the title may be translated as "The Book of What Has Been Established by Personal Reflection"). According to Abu'l-Barakāt, Kitāb al-Muʿtabar consists in the main of critical remarks jotted down by him over the years while reading philosophical text, and published at the insistence of his friends, in the form of a philosophical work. The work "presented a serious philosophical alternative to, and criticism of, Ibn Sina". He also developed concepts which resemble several modern theories in physics.