Quotes from book
Kuzari
The Kuzari, full title The Book of Proof and Evidence in Support of the Abased Religion , also known as the Book of the Kuzari, is one of the most famous works of the medieval Spanish Jewish philosopher and poet Judah Halevi, completed around 1140. Originally written in Arabic, it was then translated into Hebrew and is regarded as one the most important apologetic works of Jewish philosophy.

Part Three, "the Baptists" refers to the word meshumadim in the jewish prayer, followed by the words "will have no hope", the hebrew word can be explained in other ways
Kuzari (1140)

“Thy way of thinking is indeed pleasing to the Creator, but not thy way of acting”
Part One
Kuzari (1140)