Everybody has things in their life that pulls them down, preventing them from achieving their goals, preventing them from loving life and loving themselves.
Think about the reason why many birds can fly, it's because they are incredibly light.
Well we are not birds of course,
What is existence? How could we know we really exist? Well, mathematically, we shouldn't exist. In fact we couldn't even know whether we are really exist or other's existence are the same as our existence.
Some people are born with natural talent, while others must work day in and day out to achieve theirs. We can easily see it in another people, we can recognize their talents, encourage them to take action, to go for their dreams and passion.
When we're mad and our mind are spinning with vengeance, it's natural to wish the worst upon the person we're mad at. At some point, whether your friend betray you or your neighbor stole your cash or even something so simple like your parents forgot your birthday, we've all feel the pain of the broken unwritten promises.