Felix Adler,
Creed and Deed: A Series of Discourses
“ Spinoza was the great philosopher of Pantheism. Beneath all diversity there is unity. In all of Nature's myriad forms and changes, there is a substance unchangeable. It is uncreated, undivided, uncaused, the Absolute, Infinite, God. Thought and extension are its attributes; it is the One in All, the All in One. God is not matter, is not mind; is that deeper unity in which matter and mind are one; God or Nature, Spinoza says. This is not the God of theology. God is in the tree, in the stone, in the stars, in man. ”

