Arguments for the Existence of God in Spinoza's Works

Having accepted the monism, Spinoza held that God is the unique substantial truth of the world and other beings are modes of his attributes. In his arguments for the existence of God, he applies both a priori and a posteriori methods; though the former is in his opinion stronger then the later. The arguments are mainly discussed in these works: The Principles of the Philosophy of Rene Descartes, Short Treatise on God, Man, and his Well-Being, and Ethics. His important argument for the existence of God is the ontological argument and his version is like Descartes’ one. There is some dispute on the relation between this argument and others. Some of his commentators thought of the separation and some of the identity of them. In this article Spinoza's arguments in his works as well as some commentaries on them will be discussed.