People like Chopra sell the idea that you can alter DNA and the rest of physical reality with just your thoughts. Krauss has a great philosophical answer to that. "Not everything is possible," he says, "That's what makes the world so interesting."
He goes on with a logical scientific answer, too:
We are connected to the world by many things: by light and sound and heat. But we behave like classical objects for a reason: We're big, we have lots of particles, they interact. All the weirdness of quantum mechanics gets washed out on the scale that we experience. That's why we experience a classical world.After that, I recommend reading Victor Stegner's "The New Spirituality" over at the Huffington Post. Chopra really believes, and has said, "The physical world is a creation of the observer."
"Do you really believe that?" asks Stegner. His one-word answer: "Don't." Chopra knows something about quantum mechanics. He clearly has some familiarity with nonlocality and the uncertainty principle. It's fascinating stuff. One thing I know better than Chopra, though, is that Richard Feynman knew, and Victor Stegner, Neil deGrasse Tyson, and Lawrence Krauss know a lot more than Chopra does. I'll rely on their analyses to learn actual science.