Ever heard the saying "what ever is meant to be, will be"? Fate is always going to happen. No one can change it. If two are meant to fall in love, they will. If one is meant to die tomorrow, they will. There is nothing in the world that can change the outcome of something meant to be. Fate.
Fate can be pretty scary. People like things that are controlable. Fate is not one of them. How does one know there own fate? Some believe in horoscopes and astronomical messages. However, one never really knows.
In the end, fate is really what controls life.