The Torah of the Rebbe is a spark of ruach hokodesh (holy spirit). Even when alone, the Rebbe receives sparks of ruach hakodesh according to the needs of his followers. Even a Rebbe’s personal avoda (service) affects his students. We can be influenced by the words of tehillim (psalms) and the Zohar, even though we don’t begin to understand the intent of the authors. The impact of watching a tzaddik perform a mitzvah can be much greater than listening to hundreds of shiurim (classes). If we leave the Rebbe, upset that we didn’t express ourselves properly, that alone is a sign that we were influenced by the Rebbe.