Nosato Lirei'echo 5736 נתת ליראיך תשל"ו part 3/5 (Se'if 5-6)

Contrasting בירורים (even by מצות לא תעשה) with נסיונות, the רבי explains how נסיונות are not a true existence - as by the 'river' in the story of the עקידה - and that is how a איד passes tests - by remembering that they are only passing tests!This explains the עבודה of the פריערדיקער רבי in prison, making a firm resolution not to be intimidated by them - being that they are not a true existence. (See linked שיחה.)Continuing on into the main part of the מאמר, the רבי sets out to explain at length the difference between בירורים and נסיונות, beginning with the overall explanation of the reason for the נשמה's drastic descent into this world.