Reb Aharon of KarlinShort Biography: Reb Aharon of Karlin (1802-1872) was the son of Rebbi Asher of Stolin and he was called after the name of his grandfather Reb Aharon the Great, a disciple of the Maggid of Mezeritch and the founder of the Karliner dynasty which still thrives today. He was known to be pure and holy from his childhood and was groomed to be a leader. When he was only 25 years old, his father passed away and the yoke of the spiritual leadership of the Karliner Chassidus was thrust upon him.
His grandfather-in-law, the Rizhner Rebbe said of him, that his desire for truth was so intense that if there were a crumb of truth under the floorboards he would rip them up with his bare hands to lay hold of it.
He followed the path of the Karliner Rebbes in prayer, that of "Splitting the Heavens". It is a style of prayer which is thunderous to the ear, a prayer which brings ones every limb into the service of Hashem.
Once, on Shabbos, when he was visiting his son-in-law, the first Sadigerer Rebbe, he was honored with leading the Mussaf service. As Reb Aharon approached the reader's stand, the Sadigerer Rebbe whispered to his Chassidim, "Listen well to this Mussaf, because this you won't hear again until the coming of the Messiah."