potassium

They called me an unpolished diamond.

I pretend I do, but I don't really see it.

He told me to:
1. Fine-tune, tone down
2. Work hard
3. Set the bar higher

Noted, but how do I do that? I don't know how to.

I'm a potassium - highly reactive and explosive.

Disgressing:
From Jerry Maguire...
"I pretended that the proposal by the car was real, it might just have been hypothetical, but at least I can do something about it now..."