Before Shavuos 5748, the Rebbe aroused the assembled at the farbrengen to make the necessary preparations for the upcoming Yom Tov.
“Even before learning the meaning of Shavuos in Chassidus,” the Rebbe said, “it should be learned simply, as it is in Kitzur Shulchon Oruch.”
When Reb Yitzchok Block began returning to Yidishkeit, as one of the early Baalei Teshuva of Dor Hashvi’i, he merited a unique relationship and personal guidance from the Rebbe.
Yitzchok wanted to learn Chassidus, but the Rebbe said to him, “First learn Kitzur Shulchan Oruch.”
After learning through it once, he asked the Rebbe permission to begin Chassidus, but the Rebbe didn’t allow him. The Rebbe told him to review it, and then a third time. Only then should he begin to delve into the sweetness of the secrets of the Torah.
(Hisvaaduyos 5748 vol 3 p. 355; Yachas Raboseinu Nsi’einu l’ Kitzur Shulchon Oruch p. 7)