"Never, and I mean never, allow anyone else's idea of who you can and can't become sully your dream or pollute your imagination. This is your territory, and a KEEP OUT sign is a great thing to erect at all entrances to your imagination."  Dr. Wayne Dyer

Our imaginations are extremely powerful and very personal.  How we act and feel is based directly on what we think.  Imagine you can't do something and you'll act on that thought.  It's bad enough we allow our own negativity to enter our thoughts, but no one else has the right...or the key.. to enter our imaginations unless we give it to them.  So put out that "Keep Out" sign except for the best thoughts and the most wonderful dreams.