Editing Menachem Zev Greenglass (section)

== Life History ==
Born on Rosh Chodesh Teves 5677 to a family of Alexander chassidim in Poland. In his youth, he traveled to learn in Yerushalayim. Upon returning to Poland, he once observed the unique davening of his friend R' Moshe Eliyahu Garlitzky and decided he wanted to learn in a place that teaches how to daven properly. He then went to study at Tomchei Temimim Lodz under Rav Menachem Mendel Rozenmoter.

In 5695, the Frierdiker Rebbe sent the Baal Shem Tov's siddur to Lodz to show to potential donors who would give substantial contributions to the local Tomchei Temimim. The Frierdiker Rebbe set two conditions: 1) Going to mikvah first 2) People couldn't touch the siddur themselves - only one of Rav Shneur Zalman Schneerson's (of Vielizh, Lodz) trusted people could turn its pages for viewers. Rav Gringlas was chosen for this task.

In 5699 (1939), with WWII's outbreak, Rav Gringlas and Rav Shmuel Dovid Raitchik were chosen to receive a farewell bracha from the Frierdiker Rebbe on behalf of the yeshiva. Some talmidim escaped to Lithuania and reestablished the yeshiva there.

He learned extensively from Rav Shneur Zalman Schneerson (of Vielizh, Lodz), particularly in Kabbalah. When the Lodz yeshiva closed during WWII, he studied at Tomchei Temimim Shanghai and later Otwock.

Known for his simcha, he received guidance from the Frierdiker Rebbe about channeling joy into kedusha. The Frierdiker Rebbe was especially mekarev him, once addressing him as "my talmid" - a letter Rav Greenglas requested to be buried with. During his time in Otwock, the Frierdiker Rebbe once blessed the talmidim saying "Temimim! The smallest among you revives the dead!" Rav Gringlas was found to be the youngest present.