“Jews will move increasingly to vegetarianism out of their own deepening knowledge of what their tradition commands as they understand it in this age.”
Quoted in James V. Parker, Animal Minds, Animal Souls, Animal Rights, University Press of America, 2010, p. 98 http://books.google.it/books?id=I0Psf3FLKroC&pg=PA98.
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Yitzhak HaLevi Herzog 1
Israeli rabbi 1888–1959Related quotes
“If we depart form tradition, it is out of knowledge, not innocence.”
Abstract Expressionism, Davind Anfam, Thames and Hudson Ltd London, 1990, p. 51.
1950s

“Vegetarianism: a kashrut for our age.”
Seek My Face, Speak My Name: A Contemporary Jewish Theology (Northvale, NJ: Jason Aronson, 1992), p. 87.
“Out of the Armana Age synthesis emerged the earliest traditions of Israel and Greece.”
Introduction
The Common Background of Greek and Hebrew Civilizations (1965 [1962])
The just and merciful human behaves toward animals as a just and merciful Creator behaves toward humans.
“Hierarchy, Kinship, and Responsibility: The Jewish Relationship to the Animal World,” in A Communion of Subjects: Animals in Religion, Science, and Ethics, edited by Paul Waldau and Kimberly Patton (New York: Columbia University Press, 2006), 97 https://books.google.it/books?id=wi4n8i4YgpYC&pg=PA97-98.

"Why We Need To Understand Science" in The Skeptical Inquirer Vol. 14, Issue 3 (Spring 1990)
Context: Science is much more than a body of knowledge. It is a way of thinking. This is central to its success. Science invites us to let the facts in, even when they don’t conform to our preconceptions. It counsels us to carry alternative hypotheses in our heads and see which ones best match the facts. It urges on us a fine balance between no-holds-barred openness to new ideas, however heretical, and the most rigorous skeptical scrutiny of everything — new ideas and established wisdom. We need wide appreciation of this kind of thinking. It works. It’s an essential tool for a democracy in an age of change. Our task is not just to train more scientists but also to deepen public understanding of science.
Awakening Compassion http://www.unfetteredmind.org/awakening-compassion. Unfettered Mind http://www.unfetteredmind.org. (Topic: Practice)
Reported in Judaism and Vegetarianism by Richard H. Schwartz (New York: Lantern Books, 2001), in the “ Statements of support https://archive.org/stream/JudaismAndVegetarianism#page/n3/mode/2up” section.

“The Jew must clearly understand one thing at once, he must get out!”
Speech in Vienna after the Austrian Anschluss (1938); when asked at the Nuremberg trials whether he meant what he said in this speech he replied "Yes, approximately." As reported from testimony in the Imperial War Museum, Folio 645, Box 156, , (20 October 1945), pp. 5-6

Lecture 1A, 13:45
Mythology and the Individual (1997)
Context: The image of the cosmos must change with the development of the mind and knowledge; otherwise, the mythic statement is lost, and man becomes dissociated from the very basis of his own religious experience. Doubt comes in, and so forth. You must remember: all of the great traditions, and little traditions, in their own time were scientifically correct. That is to say, they were correct in terms of the scientific image of that age. So there must be a scientifically validated image. Now you know what has happened: our scientific field has separated itself from the religious field, or vice-versa. … This divorce this is a fatal thing, and a very unfortunate thing, and a totally unnecessary thing.