חסידות אויף אסתר 1:6

Therefore he is called Yosef, יוֹסֵף, the aspect of (Genesis 30:23) "God has taken away my disgrace", for He collects and nullifies all of the shame and embarrassment from the Jewish people. He returns them in repentance and draws them close to Hashem Ysibarach. This is the aspect of (Genesis 30:24) "May Hashem add another son for me". Because of this he is called Yosef, meaning that the tzaddik always engages in collecting and bringing close new souls at every moment. And he always requests from Hashem Yisbarach on this, the aspect of 'May Hashem add another son for me'. Hashem adds a new student for him at every moment, which is called a son, for whoever teaches Torah to his friend's son is as if he bore him (Sanhedrin 99b). And he constantly searches and requests to collect and bring new ones closer, in the aspect of 'May Hashem add another son for me'. Therefore, (Genesis 37:3) "Israel loved Joseph best of all his sons", because he was the son of his old age and he loved him very much for this. He wanted with this to have mercy on everyone, and to make a plan to bring everyone close. This is (Id.) "for he was the child of his old age". Old age is the aspect of very great mercy, the aspect of "the old are filled with mercy", the aspect of the thirteen attributes of mercy, which are a very great mercy. In other words, he received from him all of the thirteen attributes of mercy, which are the aspect of "old age", as explained above. Through this he takes mercy on everyone and brings everyone close. And this is as Onkelos interpreted on 'for he was the child of his old age', (he interpreted it as) 'for he was the child of wisdom to him'. A child of wisdom, certainly, for one needs for this great and wondrous wisdom, a very very deep wisdom, in order to create vessels and contractions like these, in order to bring these far away souls close, these sick ones, and to put the perception of G-dliness into them, as explained above. And this is (Id.) "he had made him an ornamented tunic". This phrase's explanation is: 'fine clothing that had beautiful colors, the aspect of white cotton and blue wool' (see Esther 1:6). In other words, because he sees that he engages in bringing close those souls that are far, therefore he made him wondrous clothes that had beautiful and wondrous colors, the aspect of a coat of many colors, meaning the aspect of wondrous contractions which are the aspect of garments and clothes so that he may continue to bring mankind to the perception of G-dliness, even to those who are very far away, as we said above. This is the aspect of Lower Wisdom, as explained above. These are garments of all colors, for they are all the garments and clothes of holiness that are upon them - those who perceive His blessed G-dliness, as it is written in the Holy Zohar in several places, that it is a coat made up of all the colorsm דְּאִיהִי כְּלִילָא מִכָּל הַגְּוָנִין.