1. You can control you bad mood by releasing the endorphins aka "the feel good" chemical that the brain releases. This happy neurotransmitter is scientifically proven to enhance mood in humans.
2. To be scientifically literate is to empower yourself to know when someone else is full of shit.
3. It would be possible to describe everything scientifically, but it would make no sense; it would be without meaning, as if you described a Beethoven symphony as a variation of wave pressure.