Every human actions becomes dangerous when it is deprived of human feeling. When they are performed with feeling and respect for human values, all activities become constructive.
If I am only happy for myself, many fewer chances for happiness. If I am happy when good things happen to other people, billions more chances to be happy!
I personally believe this: We have only today; yesterday's gone and tomorrow is uncertain. That's why they call it the present. And sobriety really is a gift... for those who are willing to receive it.