I really do believe that everyone of us can make a difference.

"If you wait until you can do everything for everybody instead of something for somebody, you'll end up doing nothing for nobody."

And that's the point. We can do anything. How big or small it seems: it does make a difference even if you don't see it yet.
I wish that we light up the sky with the good things we do everyday to make a difference.
Never give up and never let the thought that "this little thing doesn't make a difference" ruin your mission.
There are no limits.