Deepak Chopra says
Understanding is the knowledge that suffering is shared by everyone. When you understand that you aren't alone in your suffering.
But my question is that knowing that other people are suffering,does it make your suffering less? Do you feel relieved? Do you feel happy that His/ her suffering is worse than mine. Do yo feel sad, that your problem is bigger than theirs... I feel the suffering whose evr it is stays there untill you yourself are ready to deal with it.