This asymmetry in knowledge is reason to be optimistic, because it means there are no limits to our improvement. We can always imagine a better way -- and we are also always improving what/who the “we” is. Optimism recognizes that our potential for improvement is infinite in all directions.

... But here I'm making the opposite point. It looks for all the world as though our "tiny dot" has a real shot at being the origin of a galaxy-scale civilization. "

All the evidence so far indicates that there are no limits for knowledge or improvement.