Editing Yehoshua Lein (section)

== In the Presence of the Rebbe Rashab ==
The first time he visited the court of the Rebbe Rashab and entered for yechidus, the Rebbe Rashab asked him to stay in Lubavitch. He humbly replied "If the Rebbe commands me," but the Rebbe did not command him to stay, rather told him: "May Hashem help that you should want to learn and know how to learn, and that you should be a yerei shamayim - that is the main thing."

After several years of diligently studying with his uncle the Radatz Chen, he went to learn in the court of the Rebbe Rashab in Lubavitch and was counted among the 'yoshvim' who diligently studied Torah and avodah there. When Yeshivas Tomchei Temimim was established, he was among its first talmidim and merited to learn there for several years until his marriage. He was very beloved by the Rebbe Rashab, who once said about him during a farbrengen "Yehoshua is mine."

During that period, he was sent by the Rebbe Rashab to the Rogatchover Gaon to receive semicha for rabbanus. After the examination, the Gaon testified about him that he "knows how to learn."

After his marriage to his wife Masha, he traveled to Lubavitch for the month of holidays in 1901. During hakafos on Simchas Torah, he danced with enthusiasm together with two other chassidim (Reb Shlomo der Geler and Reb Avraham Yaakov Mozaritch). The Rebbe Rashab greatly enjoyed their dancing and watched them at length until he said: "This is a dance of the heart, the 'yechida l'yachdecha' of Simchas Torah... Although this is 'jumping' enthusiasm, it's all within the bounds of a Chabad dance. A Chabad dance with all its enthusiasm and fervor - remains a Chabad dance"...