bad luck ?

do you know bad luck ?
it is something that some people believe bring something bad to us.
some people say that bad luck was a cursed that make people feel angry, sad or anything that make your mind and heart tired.

so it is a scary luck, huh ?
i think no .
bad luck came from our mind too
if we think we get a bad today, that feeling make us think that we've been cursed with bad luck.

so do you agree with this things ?