Beginning a new מאמר, the רבי fuses together the explanations of רש"י and the זהר on the פסוק describing שרה's life, in the beginning of פרשת חיי שרה.

Does תשובה really change me? How do I change my past that might not be so great?

In learning a lesson from the life of שרה, the רבי shows us how we can be in control of our past!