Ba'al Shem Tov, Vayetzei 14/בעל שם טוב על התורה·ויצא י״ד

1And Jacob lifted up his feet. (ibid. 29:1)These are the aspect of the lowest levels. For when Tzaddikim experience a state of constricted-consciousness, they uplift the sparks that are relegated to the lowest levels.Degel Machane Ephraim, Vayetze