As we look farther into the observable universe, dig deeper into subatomic particles, science is coming full circle back to what contemplatives and mystics have always known.

One aspect of quantum physics is especially revealing. Called superposition, it’s the mathematical concept that subatomic particles exist in a kind of cloud of probability—a continuous wave—where all states and properties are possible at the same time. But the moment an observer interacts with them, superposition collapses ...