没有人可以对另一人的伤痛感同身受

The reason so many people find it so hard to be happy is that they will always see the past better than it was, the present worse than it is, and the future less resolved than it will be. ——很多人不快乐，因为总觉得过去太美好，现在太糟糕，将来又太飘渺。