Daniel Matt is widely thought to be the best translator of the Zohar into English.
Matt has recently returned to the Graduate Theological Union in Berkeley, after a period of work in Jerusalem..
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His works include Zohar, The Book of Enlightenment (Paulist Press, 1983)--a selection of Zohar passages presented in English--and The Essential Kabbalah: The Heart of Jewish Mysticism (Harper San Francisco, 1995).
Daniel Matt is widely thought to be the best translator of the Zohar into English