Click on the phrases to see them in context. The original texts by Immanuel Kant and David Hume are available from the Gutenberg Projet.

But this systematic unity of ends in this world of intelligences- which, as mere nature, is only a world of sense, but, as a system of freedom of volition, may be termed an intelligible, that is, moral world (regnum gratiae)--leads inevitably also to the teleological unity of all things which constitute this great whole, according to universal natural laws--just as the unity of the former is according to universal and necessary moral laws--and unites the practical with the speculative reason.