Rashi explains that Bilaam took note how every tribe dwelled unto himself, maintaining its individuality, not intermingling with one another. Furthermore, he observed that the entrances to the tents were not aligned opposite each other, so that one would not be able to peer into the tent of his neighbor. When he saw this, he could not curse the Jews. Horav Yitzchak Zilberstein, Shlita, cites a novel homiletic exposition of the words, she'ein pischeiham me'chuvanim, "that the entrances (to their tents) were not aligned opposite each other." He says that this is a reference to Chazal who say, "Hashem says, 'Open up for Me an opening the size of a pin point, and I will open up for you an opening the size of a large hall.'" This means that if a Jew demonstrates a sincere desire to repent and return to Hashem, he has only to create a small opening to allow an opportunity for his return. Hashem will, in turn, magnify this opening, giving him every opportunity for a teshuvah sheleimah, complete repentance. Hashem wants the Jew to come home, to return to a life of observance and commitment. He just wants us to make the first move - however small it may be. He will enlarge it, allowing for our repentance to take effect.
This is the meaning of "their entrances are not aligned." The Jew only has to create a small entranceway for his return. Hashem will do the rest. Bilaam saw that the "entranceways" do not coincide. Hashem does so much more for us, because of His overriding love. When Bilaam realized how distinctive we are to Hashem, he decided not to curse us. Why is this? Why are we privileged to have such a unique relationship with the Almighty? Rav Zilberstein suggests that this idea applies not only to repentance, but even to every day mundane activities. The little that we do can have great ramifications. There is a domino effect based on the actions that we take. A smile, a few pennies, a good word - every little thing that we do can mushroom into a great act of kindness that can actually change someone's life. Hence, the small opening that we make can catalyze an awesome consequence.
