You Have A Purpose

 Din Shlichus is derived from the שחיטת קרבן פסח in מצרים right before the Geulah [Kiddushin 41].

One is redeemed from exile when he realizes that he is a שליח from Hashem with a purpose in this world.

[עפ"י הרבי מחב"ד זצ"ל]