He was widely regarded as one of the greatest kabbalists in Israel,[1] and was an expert in the writings of the Arizal and the siddur of the Rashash.

[2][3] He was born in Jerusalem to Rabbi Yosef Eisenbach, a sofer (scribe), and studied in the Talmud Torah and yeshiva of Shomrei HaChomot.

He was also one of the first students of Yeshivat Beit Avraham-Slonim, which was then led by Rabbi Sholom Noach Berezovsky, the Rebbe of Slonim.

At different times, he served as mashgiach ruchani for the Slonim Yeshiva, and as maggid shiur (lecturer) for an elite group of students at Toras Emes.

He knew all the writings of the Arizal and the siddur of the Rashash by heart, and was an expert in davening with the kavannot (mystical intentions) of these kabbalistic masters.