  The most obvious difference is in Albert's views of the subalternation of one science to another, and the role of mathematics in the natural sciences. Since Albert does not accept a substantial form of a thing that acts as an exemplar to preexisting matter, and does not accept the development of lower forms of individuals from higher forms in the mind of God, he rejects the notion that “natural things are founded on mathematical being, and mathematical being on divine being … so that the principles of natural being are mathematical.” (Albert the Great, Commentary on the Metaphysics, Book I Chapter 1.) For Albert the unity of a particular thing is rooted in its particular substantial form, and does not arise as an expression of a higher, mathematical unity, nor can any knowledge of particular natures in themselves be obtained through reflection on being itself, or other higher forms. Each science must stand on its own, and we cannot even derive the species from its genus, much less from its mathematically expressible accidents.The new account of subalternation worked out by Albert was accepted in general by later Aristotelians (for instance, in Ockham, Summa Logicae III.II 21), and Grosseteste's account was abandoned.