Avraham sent Eliezer with a Malach before him- already set it all up. Success of our shlichus is already happening/going to happen as we are Avraham's eved.

Parshas Chayei Sara, Chelek Chof Hey, pg 99.

189. Chayei Sarah Attachment with Hashem

Sichos taught by Mrs. Fruma Schapiro, moderated by Etty Schwartz. Begun as a passion project to help spread Chassidus by learning the Rebbe's words for women on the go throughout our hectic lives.