Facts or Beliefs?

I control my own happiness – is that a belief or a fact?

The worst thing that can happen is a feeling – belief or fact?

An emotion/feeling is just a vibration in your body – belief or fact?

I’m trying to understand so that when I’m talking with people about these ideas, I know whether I’m just telling them something I choose to believe in, or am actually telling them a fact they may not have known.