birds of a feather flock together

Its true people who are alike tend to stick together, so "birds of a feather, flock together" is a saying with lots of truth value in it. They also say "like poles attract, unlike poles repel" to point this out as well. Its amazing how such ordinary facts can be converted into proverbs ready to use in the real life. Just like the chinese proverb, "The man who runs after the car, gets exhausted"... these proverbs can guide you in your life...!