I once conducted the following experiment. I filled a jar with plain water from the tap at my office in Tokyo, and then I put it on my desk. Since the water came from the city water-works system and contained chlorine, attempts to make crystals from the water failed.
I then asked for the help of five hundred people located throughout Japan. At the same time on the appointed day, they all sent positive thoughts to purify the water on my desk and then sent the message "Thank you" to the water.
As expected, the water changed and was able to form beautiful crystals. The chlorinated water from the tap had changed to pure water.
How could this have happened? I think you know the answer. The thoughts and words of five hundred people reached the water without regard for the borders of time and space.
Masaru Emoto, The Secret Life of Water
Emoto is also the author of The Hidden Messages in Water, a book I had looked at briefly some years ago without really considering its significance. Due to my studies in Buddhism (and after reading Dan Brown's latest thriller, The Lost Symbol), I find the ideas in this book to be some of the most overlooked and most important in human existence. And no, that's not an exaggeration - books like these are considered by the mainstream to be too "out there" or junk science, but if you'd explore the concept for yourself over a given time, you too might be a "believer".
As Brown says, imagine a grain of sand: pretty small and insignificant, right? We know it has mass, therefore it exerts a certain gravitational pull on nearby objects, but by itself, this effect is minimal. Now consider a beach full of these grains of sand: the mass of these millions of pieces now has the power to affect objects on a larger scale. Both Emoto and Brown's characters have got it right:
Thoughts are just like these grains of sands, and we can see the effects of positive and negative thoughts on matter in the real world.
Why do doctors encourage positive thinking in terminal patients? How is it that someone's soulmate can know if harm befalls the other when they're separated by an ocean? Why should the shapes of crystals in water change according to the thoughts being directed at them? Why do followers of a particular religion seem to gain support quickly and with absolute devotion (it's certainly not for the logic of their holy books)? Because thought has power outside of the mind, and for people thinking the same thoughts, the effect is exponential.
Emoto goes a bit further than this, exploring the crystals formed when water is exposed to positive and negative thoughts, writings, music, prayers from different religions, and when it is gathered from certain sources. I admit he goes a little over the edge (for me, at least) when discussing his ideas of water changing the world, but his heart is in the right place, and the research and pictures are fascinating.