It's useful to look at existence as an ocean.
If you give one drop of water, the entire ocean raises.
If you take one drop of water, the entire ocean decreases.
So if you pay some extra money to your hairdresser, then he may treat the next customer better and this next customer will feel lighter since most people use their hairdressers as therapists and upon arriving home this next customer will treat their children better and so on.
If everyone on the planet right now became criminals and started stealing each other, the world would collapse within seconds.
But if everyone became more positive and started giving more (truth, love, effort, money, attention, understanding, wisdom, advice, time, etc), then we would have a paradise on Earth.
This proofs that this universe works upon the principle of giving.
It's not easy to be always positive, especially when we are angry, but in those cases we must have the strength to stop this cycle of hate on ourselves so we don't transmit it to the next person.
The more you give, the more the ocean raises (and that includes you, your life gets better).
