The Heterodox Judaism of Baruch Spinoza There is only one and unique substance in existence, a substance that is infinite, self-caused, and eternal. This substance is the spatio-temporal world. But it is also God, says Baruch Spinoza, the Sephardi Jew from Amsterdam excommunicated by the Talmud Torah congregation. The Heterodox Judaism of Baruch Spinoza Baruch Spinoza was born in 1632 in Amsterdam to a Sephardi Jewish family who had fled Portugal because of persecution by th