You see poor people, I see an opportunity to feed them. You see no shelter, I see an opportunity to create shelter.
Thats the thing with people who tell positive people to stfu. We see things that are there, that you may not be able to see.
Just by thinking positively won't change shit. Acting on the positive thoughts will change the world.

So with respect, you stfu, and instead of spreading negativity, spread solutions. The stepping stones to solutions is positive thinking.

Ying and Yang. Black and white. You see the dark, I see the light, in every situation.