Self-awareness
We are self aware but so are other animals on Earth!
The problem with "thinking" and "self-awareness" is that it is very difficult to understand what they mean because there are no other species to easily compare them with.
As long as it's the case, I'd rather stick to our insignificance rather than belief of our worthiness as a species. Humans have often payed a too high price because of their faith in their importance.