I think that the thing related to podcast #5 that talks about how we create our own reality just by believing about it has some scientific basis as well and is not just a mumbo-jumbo.
Take a look at this - the reality for Bill Gates may be a million dollars earned every week or so. But in your reality to earn a million would take months or even years. So the reality is not something "fixed" it is based on belief. Aside the fact that Bill started earlier (but that's also again based on a belief so even that is debatable).
So on to the scientific facts - as you may or may not know, the universe is made of atoms, which are by the latest quantum theory not just small marbles spinning around each other but a concentrated form of energy. So basically, the whole universe is made of energy. Even your body. The body even has centers of energy called chakras. I think that they are nothing more than cross-sections of atom's energy due to the the body shape. They have specific locations because the body is shaped like it is.
And finally we have the brain. Which is again a system for controlling all those other centers and it also has a constant flow of energy (in form of electric impulses) and so.
So if the brain is the "mind" that controls a group of atoms that your body consists of - it can also control few other things around itself. It has been proven that certain energy can affect certain molecules. And guess what... brain emits... energy. So what would happen if we could channel or focus that energy into some specific goal or into some specific belief?
The matter around would begin to transform. Remember the matter is not made of tiny marbles but a form of energy. The energy to which we can influence on using our antennas we call the brain.
Anyway, if you are interested more on this topic you should study the quantum physics and how it works - you may be surprised how weird our reality actually is.
So back to the original topic - for the reasons I just displayed I think that the beliefs can really affect your life and the matter that surrounds you and that there are scientific evidences why this behavior happens.
BTW, a form of "proof" that brain really emits some energy can be found on various research - and I think one of the good ones is the one with Japanese scientists found that our thoughts can affect the water crystals. This post would be too long to explain all the things about that, you should probably google for "Dr. Masaru Emoto" on that topic. Anyway to make this short - when he placed words like "love" the clean and uniform crystals formed and when there was something like "hate" the crystals didn't form at all. The water is made of dipoles (like small magnets) so the energy could affect their configuration. Not the energy from the word - but I think the energy from our brains - associated with that particular word.
What do you think about my 'theory'?