He endeavoured to explain away certain of the contradictions which are found in Kant's system by saying that much of the language is used in a popular sense for the sake of intelligibility, e.g. where Kant attributes to things-in-themselves an existence under the conditions of time, space and causality, and yet holds that they furnish the material of our apprehensions. Beck maintains that the real meaning of Kant's theory is idealism; that knowledge of objects outside the domain of consciousness is impossible, and hence that nothing positive remains when we have removed the subjective element. Matter is deduced by the original synthesis. Similarly, the idea of God is a symbolical representation of the voice of conscience guiding from within. The value of Beck's exegesis has been to a great extent overlooked owing to the greater attention given to the work of Fichte. Beside the three volumes of the Erlauternder Auszug, he published the Grundriss der krit. Philosophic (1796), containing an interpretation of the Kantian Kritik in the manner of Salomon Maimon.