The whole of what we know is a system of compensation. Every defect in one manner is made up in another. Every suffering is rewarded; every sacrifice is made up; every debt is paid.
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.
The saddest thing in life and the hardest to live through, is the knowledge that there is someone you love very much whom you cannot save from suffering.
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.