We all have problems for dealing with life. However, if you can completely solve one, only one person's problems, your own problems will be solved too. Unfortunately, that rarely happens in life. We are not beaten by the hardships, we are beaten by seeing people and cannot saving them. Once and once again, find out love is pointless.
Therefore, the biggest kindness to people, and to the world, is taking good care of yourself and giving a smile. Hopefully, everything will be better next life.