Einstein on God:
"Certain it is that a conviction, akin to religious feeling, of the rationality and intelligibility of the world lies behind all scientific work of a higher order. The firm belief, which is bound up with deep feeling, in a superior mind revealing himself in the world of experience, represents my conception of God, which may, therefore be described in common parlance as `pantheistic' (Spinoza)."
"My religion consists of a humble admiration of the illimitable superior Spirit who reveals himself in the slight details we are able to perceive with our frail and feeble minds. The deeply emotional conviction of the presence of a superior reasoning Power, which is revealed in the incomprehensible universe, forms my idea of God"
"You will hardly find one among the profounder sort of scientific minds without a peculiar religious feeling of his own . . . .His religious feeling takes the form of a rapturous amazement at the harmony of natural law, which reveals an intelligence of such superiority that, compared with it, all the systematic thinking and acting of human beings is an utterly insignificant reflection"
"I'm not an atheist and I don't think I can call myself a pantheist. We are in the position of a little child entering a huge library filled with books in many different languages. The child knows someone must have written those books. It does not know how. The child dimly suspects a mysterious order in the arrangement of the books but doesn't know what it is. That, it seems to me, is the attitude of even the most intelligent human being toward God. We see a universe marvellously arranged and obeying certain laws, but only dimly understand these laws. Our limited minds cannot grasp the mysterious force that moves the constellations. I am fascinated by Spinoza's pantheism, but admire even more his contributions to modern thought because he is the first philosopher to deal with the soul and the body as one, not two separate things "
"But, on the other hand, everyone who is seriously involved in the pursuit of science becomes convinced that a spirit is manifest in the laws of the Universe-a spirit vastly superior to that of man, and one in the face of which we with our modest powers must feel humble. In this way the pursuit of science leads to a religious feeling of a special sort, which is indeed quite different from the religiosity of someone more naive."
Einstein did believe in a superior intelligence, but he did not believe in a "personal" God who concerns himself with the "petty" matters of mankind. He believed that the universe was God's perfect creation.