Both men [Yeshu/Jesus and Spinoza] were exceptionally bright, and men of spirit. They could have become major spiritual forces in Judaism had they be… - Benedictus de Spinoza

The only successful attempt to free human reason from the authority of religion was that of Spinoza (1632–1677). In his Theologico-Political Treatise (1670) he denied the claims for divine authority based on the text of Scripture and religious tradition. [...] Spinoza was the first secular Jew, and as such, the first secular man. Indeed, he served as the role model for all secular Jews, instituting the precise features that characterized future Jewish secularists.

[Alberto Knox] Spinoza belonged to the Jewish community of Amsterdam, but he was excommunicated for heresy. Few philosophers in more recent times have been so blasphemed and so persecuted for their ideas as this man. It happened because he criticized the established religion. He believed that Christianity and Judaism were only kept alive by rigid dogma and outer ritual. He was the first to apply what we call a historico-critical interpretation of the Bible.

Although Baruch Spinoza is one of the great thinkers of the European philosophical tradition, he was not a professional scholar – he earned his modest living as a lens grinder. So, unlike many thinkers of his time, he was unconstrained by allegiance to a church, university or royal court. He was free to be faithful to the pursuit of truth. This gives his philosophy a remarkable originality and intellectual purity – and it also led to controversy and charges of heresy. In the 19th century, and perhaps even more recently, "Spinozist" was still a term of abuse among intellectuals. In a sense, Spinoza was always an outsider – and this independence is precisely what enabled him to see through the confusions, prejudices and superstitions that prevailed in the 17th century, and to gain a fresh and radical perspective on various philosophical and religious issues.