It can be done through meditation, although I only know this indirectly from people that I respect since I don't meditate. Yoga is in my future I assure you. "...Since we create these voices, it should be in our power to quiet them or even shut them up completely. One way is to confront our internal dialog directly and tell it to shut up. Sometimes this direct approach can work and we'll get a quiet mind almost instantly..." - random internet sight http://ezinearticles.com/?Meditation---How-To-Quiet-Your-Mind&id=522525
Dear paperboy, thank you for putting this link... quite interresting... I quote from the link : the cool think is that thoughts are free, and wild as the wind... so easy to change ! jajaj I must say that the tools used are better at every generations however a clean breathing and all is gone ... how to manage what has no limit ? nothing can shape the shape itself... ^^ what's an FOS ?? the wonders of the link world