The law of the garbage truck

One day I hopped in a taxi and we took off for
the airport. We were driving in the right lane
when suddenly a black car jumped out of a
parking space right in front of us. My taxi
driver slammed on his brakes, skidded, and
missed the other car by just inches!
The driver of the other car whipped his head
around and started yelling at us. My taxi driver
just smiled and waved at the guy. And I mean,
he was really friendly. So I asked, 'Why did you
just do that? This guy almost ruined your car
and sent us to the hospital!' This is when my
taxi driver taught me what I now call, 'The Law
of the Garbage Truck'.
He explained that many people are like garbage trucks. They run around full of garbage, full of frustration, full of anger, and full of disappointment. As their garbage piles up, they need a place to dump it and sometimes they'll dump it on you. Don't take it personally, just smile, wave, wish them well, and move on.
Don't take their garbage and spread it to other people at work, at home, or on the streets.