Humans are?

And what are humans actually..? are they greedy? are they cruel? or are they simply selfish?  maybe some of them but not necessarily because one can easily found a human who is not cruel , a human who is not greedy and a human not selfish….. then what really humans are ? humans are weak cos that’s the only trait that defines every human and that is the only thing that is common in everyone of us. No matter what everyone pretends to be strong and the longer one pretends the longer we call him strong but in reality humans are just weak.                                                                                                                                                                                Dr.Zain