Suffering is how Life tells you that you are resisting or misperceiving what is real and true. It is the way Life suggests that you are not in harmony with what is.
It is not just a person's physical constitution, their intellegence, their education, or even their social conditioning that enables them to withstand hardship. Much more significant is their inner development. And while some may be able to survive through sheer willpower, the ones who suffer the least are those who have a high degree of patience and courage in the face of adversity.
Whether we like it or not, we have all been born into this world as part of one great human family. Rich or poor, educated or uneducated, belonging to one nation or another, to one religion or another, adhering to this ideology or that, ultimately each of is just a human being like everyone else. We all desire happiness and do not want suffering.
Dear little Swallow,’ said the Prince, ‘you tell me of marvelous things, but more marvelous than anything is the suffering of men and of women. There is no Mystery so great as Misery.