Otto Klemperer. We talked about Spinoza and he said “Spinoza's Ethics is the most important book ever written”. Klemperer was, as we know, Jewish. At the age of 22 he converted to Christianity because he believed that only as a Christian could he conduct Bach's St Matthew Passion. Many years later, after the War, when Klemperer had already reached old age, he converted back to Judaism. And the reason he gave was Spinoza's Ethics. Perhaps the most important Jewish philosophy. Questions about Jewish ethics and morals and “What is being Jewish?” were long identified as being a minority. The traditional thinking and perceived identity of the Jewish people in its 2,000 year history was as a minority. Historically the Jews were integrated into social and cultural life but tragically persecuted under the Spanish Inquisition and the tyranny of Adolf Hitler. What is special about Spinoza's philosophy is that, despite persecution, abuse and alienation, his thinking was never based on the premise of Jews being a minority. That is precisely why his philosophy is so contemporary, now that the Jewish people have their own state, i.e. are no longer a minority. Spinoza's Ethics remains a potent formula for creating intellectual and moral unity among the Jews." - Meaning and context.">
Daniel Barenboim, "The Purpose of the State is Freedom" (DanielBarenboim.com, December 2003)

I think back to the last discussion I had with the great conductor Otto Klemperer. We talked about Spinoza and he said “Spinoza's Ethics is the most important book ever written”. Klemperer was, as we know, Jewish. At the age of 22 he converted to Christianity because he believed that only as a Christian could he conduct Bach's St Matthew Passion. Many years later, after the War, when Klemperer had already reached old age, he converted back to Judaism. And the reason he gave was Spinoza's Ethics. Perhaps the most important Jewish philosophy. Questions about Jewish ethics and morals and “What is being Jewish?” were long identified as being a minority. The traditional thinking and perceived identity of the Jewish people in its 2,000 year history was as a minority. Historically the Jews were integrated into social and cultural life but tragically persecuted under the Spanish Inquisition and the tyranny of Adolf Hitler. What is special about Spinoza's philosophy is that, despite persecution, abuse and alienation, his thinking was never based on the premise of Jews being a minority. That is precisely why his philosophy is so contemporary, now that the Jewish people have their own state, i.e. are no longer a minority. Spinoza's Ethics remains a potent formula for creating intellectual and moral unity among the Jews.

— Baruch Spinoza

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "I think back to the last discussion I had with the great conductor Otto Klemperer. We talked about Spinoza and he said “Spinoza's Ethics is the most important book ever written”. Klemperer was, as we know, Jewish. At the age of 22 he converted to Christianity because he believed that only as a Christian could he conduct Bach's St Matthew Passion. Many years later, after the War, when Klemperer had already reached old age, he converted back to Judaism. And the reason he gave was Spinoza's Ethics. Perhaps the most important Jewish philosophy. Questions about Jewish ethics and morals and “What is being Jewish?” were long identified as being a minority. The traditional thinking and perceived identity of the Jewish people in its 2,000 year history was as a minority. Historically the Jews were integrated into social and cultural life but tragically persecuted under the Spanish Inquisition and the tyranny of Adolf Hitler. What is special about Spinoza's philosophy is that, despite persecution, abuse and alienation, his thinking was never based on the premise of Jews being a minority. That is precisely why his philosophy is so contemporary, now that the Jewish people have their own state, i.e. are no longer a minority. Spinoza's Ethics remains a potent formula for creating intellectual and moral unity among the Jews." in the context of "Daniel Barenboim, "The Purpose of the State is Freedom" (DanielBarenboim.com, December 2003)" to mean that wisdom is timeless.

Source: Wikiquote: "Baruch Spinoza" (Quotations regarding Spinoza: Alphabetized by author , A - F, Daniel Barenboim) The 'What it means' explanation text was generated by Google Gemini Flash (accessed January 18, 2026). https://gemini.google.com/app
Baruch Spinoza

About Baruch Spinoza

Benedictus de Spinoza (24 November 1632 – 21 February 1677) was a social and metaphysical philosopher known for the elaborate development of his monist philosophy, which has become known as Spinozism. Controversy regarding his ideas led to his excommunication from the Jewish community of his native Amsterdam. He was named Baruch ("blessed" in Hebrew) Spinoza by his synagogue elders and known as Bento de Spinoza or Bento d'Espiñoza, but afterwards used the name Benedictus ("blessed" in Latin) de Spinoza.