"We are all the same... People are people...
We see, we breathe our heats beat, our ears hear, we learn and grow, we are the same"

But one could reply

"No, we are not the same, some see better than others, some breath worse than another, some hearts beat fast, some slow, some ears hear worse than others, some have difficulties learning, we are not the same, but completely different"

But again the first could say

"Why are you so depressing?"

"I am not, but you are, not being able to see the uniqueness of the world and its inhabitants."