We've all heard it, there are always two sides to every issue or story. It's a natural tendency to look at things from our own perspective and self interest. Sometimes it causes us to make mistakes. We really need to look at things from each person's point of view. It makes us more effective.
I could go on and write a lot of stuff about this, but I just saw Mike Hyatt's blog on the issue. He has addressed it very well, so let me direct you to his blog.