Bo Likutei Sichos – Vol 31 p 46 ff Exile and Redemption (105) מכת חושך is compared to Golus as it relates to the Yidden (as we’ll see in the next class on this Sicha) accordingly we discuss how this מכה was a Golus (of sorts) for the Egyptians.

VaEra Exile and Redemption (091) In contrast to the convention that there are two successive stages to the Pharaoh’s stubbornness; one where he is stubborn on his own and another where Hashem makes him stubborn. The Rebbe proves that: 1) The two levels of the Pharaoh’s stubbornness are simultaneous and last for the duration of…

VaEra Exile and Redemption (084) Moshe complains (and he is right). But Hashem explains that it is the only way to get הוי’ה on the level above all constraints.

Shemos Exile and Redemption (072) Loshon HaRa is the only thing that prevents a nation from being formed, even if God is the Creator. Idolatry isn’t as negative as disunity.