Imagine two people who are very different from each other. This needn't be a source of conflict. Rather, if each one focuses on how to help the other, then the differences between them will actually make their personalities complementary.

Not only will they like each other despite their differences, but rather, because of them. They will even become closer, because their differences provide more opportunities to be of service to each other.

Contrast this to those who focus on what he can take from the other. They will quarrel frequently and eventually end up hating one another.