Steven Nadler in Aeon:
Spinoza’s philosophy is founded upon a rejection of the God that informs the Abrahamic religions. His God lacks all the psychological and moral characteristics of a transcendent, providential deity. The Deus of Spinoza’s philosophical masterpiece, the Ethics (1677), is not a kind of person. It has no beliefs, hopes, desires or emotions. Nor is Spinoza’s God a good, wise and just lawgiver who will reward those who obey its commands and punish those who go astray. For Spinoza, God is Nature, and all there is is Nature (his phrase is Deus sive Natura, ‘God or Nature’). Whatever is exists in Nature, and happens with a necessity imposed by the laws of Nature. There is nothing beyond Nature and there are no departures from Nature’s order – miracles and the supernatural are an impossibility.
There are no values in Nature. Nothing is intrinsically good or bad, nor does Nature or anything in Nature exist for the sake of some purpose. Whatever is, just is. Early in the Ethics, Spinoza says that ‘all the prejudices I here undertake to expose depend on this one: that men commonly suppose that all natural things act, as men do, on account of an end; indeed, they maintain as certain that God himself directs all things to some certain end; for they say that God has made all things for man, and man that he might worship God’.
Spinoza is often labelled a ‘pantheist’, but ‘atheist’ is a more appropriate term. Spinoza does not divinise Nature. Nature is not the object of worshipful awe or religious reverence. ‘The wise man,’ he says, ‘seeks to understand Nature, not gape at it like a fool’. The only appropriate attitude to take toward God or Nature is a desire to know it through the intellect.