Be a bottle of water. Not a bottle of soda.
What do you mean?
The bottle is you. What's inside are your emotions and reactions. The outside world and people are going attack you and rattle and shake you from time to time. If you shake a bottle of soda, when you finally open up you're going explode. But if you shake a water bottle, once you open up it's the same calm water it was before it got shook up. Don't let other people and this world disrupt your inner peace.