(1) This class is primarily a המשך to the second idea in the last מאמר- the idea that עמידה means לא שניתי because of great תוקף. He argues that עמידה is especially pronounced if and when there is adversity. This reveals Hashem עמידה בתוקף even if it is the fault of our mistakes.
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(2) In this class we learn the beginning and the end of the Ma’amar that address the questions of: why here and not everywhere? Why only below and “also” below. The answer (brought here) is because here there is adversity and this adversity reveals one’s depth of character.