Likutei Moharan 219:4/ליקוטי מוהר"ן רי״ט:ד׳

14. In addition I heard something in his name, similar to what is mentioned above, which he said concerning the verse, “Can a man hide in a hidden place, and I not see him?” (Jeremiah 23:24). For when a person lessens himself, then God, too, lessens Himself. But when a person is haughty and inflated, then God, too, shows His majesty and greatness.

2And this the explanation of “Can a man hide in a hidden place.” When a person lessens and hides himself “in a hidden place”—i.e., he hides, conceals and lessens himself in humbleness and humility—then “and I not see him?”—I in turn show Myself to him in the aspect of “not,” which is the aspect of Nothingness and Naught, the aspect of humbleness and humility, as explained above.