There can be only one Being who is wholly positive, and He must be absolutely infinite.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“There can be no such personal immortality as Christians believe in, but only that impersonal sort that consists in becoming more and more one with God. Finite things are defined by their boundaries, physical or logical, that is to say, by what they are not: “all determination is negation.” There can be only one Being who is wholly positive, and He must be absolutely infinite. Hence Spinoza is led to a complete and undiluted pantheism. Everything, according to Spinoza, is ruled by an absolute logical necessity. There is no such thing as free will in the mental sphere or chance in the physical world.” source