Nazzi Plurality in the Godhead, or How can three be one? is a work by a Jewish rabbi on the Trinity, on the plurality of God within the Godhead.
Plurality in the Godhead
or How Can Three Be One?
Rabbi Tzvi Nassi (CWH Pauli)
How can they (the Three) be One? Are they verily One, because we call them One? How Three can be One, can only be known through the revelation of the Holy Spirit (Zohar II 43b)