In a world where everything seems to be going crazy, it's easy to just fall into despair and lose hope. Sometimes it's hard to justify feeling positive when other people are suffering. Perhaps you feel guilty sometimes for the times you do feel happy because what right to you have to feel good when other people are in pain?
The thing is, your feeling bad doesn't help other people who already feel bad. Finding inner peace for yourself helps you to be in a better space to help others. You'll have more energy and more compassion.