Likutei Moharan 29:1/ליקוטי מוהר"ן כ״ט:א׳

1“A certain man went seeking a wife, but they didn’t give [her] to him. What did he see that made him go to where there was a better one?” He took a peg and pressed it in below. It did not go in. He raised it up and pressed it in higher up. It went in. He said, “That one, too, has found his bat mazleh (de st ined mate)” (Bekhorot 8b).

2“Hai Gavra D’azil (A certain man went) seeking a wife, but they didn’ t give her to him….”

3Not all words are considered speech. For words which are not heard or accepted are not called speech, as in (Psalms 19:4), “There is no speech and no words without their voice being heard.”

4Now the main reason words are accepted has to do with the good they contain, because everyone desires good. Therefore, when the words contain good, then speech is heard and accepted. But when the words have no good in them, they are not accepted.

5And how do we create the good in the words? This is done by taking speech from daat (holy knowledge). Then it has good in it. But when speech is without daat, then it has no good, as in (Proverbs 19:2), “Also, for the soul to be without knowledge is not good.” The soul is speech, as is written (Genesis 2:7), “Man became a living soul,” the Aramaic translation of which is “a speaking spirit.”