In this 1-week מאמר, the רבי uncovers what is at the core of the celebration of י"ט כסלו, what caused it to happen, and the lesson we can all learn from it.The מאמר is based on the well-known letter of the אלטער רבי to ר' לוי יצחק of Berditchev, wherein the אלטער רבי describes his liberation of י"ט כסלו.The רבי analyzes the אלטער רבי's choice of words in recording the date upon which the salvation took place, and uncovers the depth of what is truly important about the day of י"ט כסלו.In the first half of the מאמר the discussion is centered around terminology of קבלה and חסידות. In the second half of the מאמר, the רבי spells it out in more simple terms.What was the great מסירות נפש of the אלטער רבי? In a fascinating twist, the רבי uncovers a much deeper מסירות נפש than the אלטער רבי agreeing to be imprisoned: The אלטער רבי agreeing to be freed!