To make others' life better.

 

"To live is to suffer."  To make the suffering worthwhile, one needs to give it meaning.  Your child is searching for such meaning.  You should be pleased that your child has such presence of mind.

Life is like a mural, what your child sees depends on how close he stands to the wall.  If what's in front of him looks bleak, take a few steps back, take in a larger part of the picture.

Real life is not pretty, some of it are even ugly.  But there are plenty of bright spots, one needs to look for them.  It's a choice.  One will find what he is looking for.