Likutei Moharan 64:3/ליקוטי מוהר"ן ס״ד:ג׳

13. But know! if there is a great tzaddik who is the aspect of Moshe, he must especially delve into these words of heresy. And even though it is impossible to answer them, as explained above, nevertheless, by his delving into there, he elevates from there a number of souls that fell and became submerged within this heresy. This is because these conundrums and questions [raised] by the heresy that stems from the Vacated Space are the aspect of silence, since there is no intellect or letters to answer them, as explained above.

2The creation came into existence by means of the spoken word, as it is written (Psalms 33:6) “By the word of God the heavens were made, and by the breath of His mouth their entire host [was created].” The spoken word contains wisdom, because the whole of speech is but the five articulators of the mouth. Through them all the things of the entire creation came into existence, as it is written (ibid. 104:24), “You created them all with wisdom.”

3The spoken word is the demarcation of all things. [God] circumscribed His wisdom in the letters, such that certain letters demarcate one thing, while other letters demarcate something else. But there in the Vacated Space—which surrounds all the worlds, and which is, so to speak, vacated of everything, as explained above—there is no spoken word at all, and not even intellect without letters, as explained above. Thus the conundrums that stem from there are in the aspect of silence.

4This is analogous to what we find of Moshe: When he asked regarding the death of Rabbi Akiva, “Is this the Torah, and is this its reward?” they answered him, “Be silent! Thus has it arisen in thought” (Menachot 29b). That is, you must be silent and not ask for an answer and solution for this question. This is because “thus has it arisen in thought,” which is more exalted than speech. Therefore, you must keep silent regarding this question, because it is in the aspect of “arisen in thought,” where there is no speech to answer it. The same is true of the questions and conundrums that stem from the Vacated Space, where there is no spoken word or intellect, as explained above. They are thus in the aspect of silence; one must simply believe and keep silent there.

5This is why it is forbidden for anyone other than the tzaddik who is the aspect of Moshe to enter and delve into these words of heresy and the conundrums. For Moshe is the aspect of silence, in the aspect that is called “heavy of speech” (Exodus 4:10), the aspect of a silence more exalted than speech.

6Therefore, the tzaddik who is the aspect of Moshe, the aspect of silence, is capable of delving into these perplexing words, which are the aspect of silence, as explained above. He should especially delve into [them], in order to elevate the souls that fell into there, as explained above.