Likutei Sichos vol. 34 page 95-7.
The idea that in the very beginning there is the end shows itself in the idea that ‘the blowing for practice’ on the first day of Rosh Chodesh Elul is connected to Yom Kippur!
Likutei Sichos vol. 34 page 114 ff.
This Sicha focuses primarily on the third Raia from Arai Miklat (Halacha 2) and explains the need for this third proof (and in a second Halacha) because it links Moshiach to a Mitzvah which must be literal and physical and impossible to change. He explains that the three proofs have three ideas each with their...