I think I think.
I mean, I think I'm thinking. I have thoughts. Some of them are new. Or at least new to me. Maybe a few are new to anybody. That's less likely, though, since we're all always thinking all the time so someone's probably thought That Thought before you thought it, or before I thought it.
Still means you and I should try to think.
I want to think better. I want to think more interestingly. I want to think worthwhile thoughts. I want to entertain people, make them think as well, possibly change minds if my thoughts are good.
I think my thoughts are good. I think my thoughts could be better.
I think I can.