Born to a non-Hasidic family in Goraj near Lublin, Poland, he became attracted to Hasidic philosophy in his youth. He was known for having acquired impressive Talmudic and Kabbalistic knowledge at an early age. He was a student of Reb Bunim of Peshischa, and upon the latter's death attracted many of his followers. Morgensztern was well known for his incisive and down-to-earth philosophies, and sharp-witted sayings. He appears to have had little patience for false piety or stupidity. From 1839 he lived in seclusion for the last twenty years of his life.
Students and legacy
The Kotzker Rebbe never published any works. He wrote many manuscripts, but he had them all burned before his death. Several collections of his sayings have been published, most notably Emes VeEmunah. The Kotzker Rebbe's disciple Rabbi Avrohom Bornsztain, author of Avnei Nezer and first Sochatchover Rebbe, was his son-in-law. The Kotzker Rebbe is considered to be the spiritual founder upon which the Ger dynasty in Poland is based, through the teachings of its founder and first Rebbe Rabbi Yitzchak Meir Alter, known for his work as the Chidushei Harim, who was a preeminent disciple of the Kotzker Rebbe and his brother in law through his second wife. One of his major students was Rabbi Mordechai Yosef Leiner of Izbica.
Dynasty
His eldest son, Rabbi Dovid Morgensztern, succeeded him as Kotzker Rebbe.
"If I am I because I am I, and you are you because you are you, then I am I and you are you. But if I am I because you are you and you are you because I am I, then I am not I and you are not you!" "Not all that is thought need be said, not all that is said need be written, not all that is written need be published, and not all that is published need be read." "Where is God to be found? In the place where He is given entry." "You don't love fish. If you loved the fish, you would not have killed it and cooked it on a fire." "Just as it is the way of an ape to imitate humans, so too, a person, when he has become old, imitates himself, and does what was his manner previously." In other words, most of us, at some point in life, either consciously or not, become satisfied with who we are and what we've become. As such, we cease to strive toward attaining greater spiritual heights. We are content to live out our remaining days as a mere imitation of ourselves!