Getting back to Eliezer (see part I and II) , we need to remind ourselves that aside from the uncertainty inherent in choosing a suitable match for Yitzchak, Eliezer is about to encounter two of the trickiest villains in Tanach. The Lavan of our parsha is the same Lavan who “bikesh la’akor es hakol”, worse than Pharoah.
Explains the Shem m’Shmuel, it’s not by accident that Hashem, b’hashgacha, saw to it that Eliezer would have a daughter of marriageable age. What better way to ensure Eliezer set out with his guard up? Just like forcing Yehudah to take full responsibility for Binyamin, even for ones, drew out all his kochos henefesh, having a daughter forced Eliezer to struggle against personal negiyos and not set out on his task lightly.
This naturally explains Eliezer's haste and desire for certainty. Eliezer knew that if he deliberated over who the right girl should be and began dismissing shidduch offers, he would always wonder – “Is that girl really unworthy, or am I perhaps just motivated to keep Yitzchak for my own daughter?” Eliezer davened to Hashem for help, asked for the right girl to immediately be shown to him, and asked for Hasehm to remove all any need for deliberation. Furthermore, he put his own daughter completely out of his mind, so that we only find out about her after he completes his job and Rivka has been chosen. And in the end, these efforts not only cleared his conscience, but left Lavan and Besuel with incontrivertable proof that Rivka was meant for Yitzchak.
Are our difficulties there to make us fail, to trip us up, or to provide the impetus to force us to grow and discover our hidden kochos?