Based on the advancing progression of a seminal idea from "point to line to area", he summarises the cumulative generational advance in teaching, according to the Habad conception that in each generation the teachings of Jewish mysticism ascend in depth, progressively drawing down from a higher source in Divinity to prepare for the Messianic era.
Rabbi Yehuda Leib Schneersohn (1811 - 1866) was a Ukrainian Habad Hasidic rabbi, the second son of Menachem Mendel Schneersohn, and founder and first leader of Kopust Hasidism.