ואתה הקרב אליך את אהרן אחיך ואת בניו איתו מתוך בני ישראל
You must draw your brother Aharon close to you from among Bnei Yisroel.
Moshe merited to be the leader of the generation because he felt the suffering of the Jewish people and was willing to sacrifice himself for their sake. We saw this after the Golden Calf when Moshe said that should Hashem not forgive them, his name should be erased from the Torah.
In Parshas Shemos, the Torah says that “Moshe grew up”. The very next Posuk says “and Moshe grew and went out to his brothers.” Rashi comments that the first verse refers to Moshe’s physical growth. The second verse refers to his achieving greatness. What was his greatness? That “he went out to his brothers,” seeing each Jew as his brother, feeling their pain and sacrificing of himself to stand up for them in their suffering.
This is the message conveyed at the beginning of Parshas Tetzaveh when Hashem instructs Moshe to “draw your brother Aharon close to you.” As Kohen Gadol, Aharon represented the Jewish people. To fulfil this role, he needed to have the same quality of Moshe; to be able to sacrifice himself on behalf of the Jewish people.
And so, Hashem commands Moshe to bring Aharon close to him, to his level, to teach him that he too must be willing to sacrifice himself for the Jewish people.
The verse continues מתוך בני ישראל. Literally this means to “draw Aharon from amongst the Jewish people”. On a deeper level, תוך means inside. Hashem is teaching that Aharon should be elevated until his תוך, his inner core and very being should be “Bnei Yisroel” - overflowing with Ahavas Yisroel and devotion to the Jewish people.
