It was Sir John C. Eccles who first understood the importance of quantum mechanics for resolving the mind-brain problem. He proposed that mental events can cause brain events. I cite Danko D. Georgiev who said, “Indeed if one considers the wave function of a quantum particle as a non-observable mental state of pre-probabilities and the actualized position in space and time as an observable mental state, then the dualistic interactionism proposed by Sir John Eccles is consistent with the modern vision of what the physical world is.” Perhaps the afore mentioned “non-classical energy” of the mind conforms to the “non-observable mental state” and the spike trains of encoded action potentials to the “actualized position in space and time as an observable mental state.” I quote Rene Descartes who 400 years ago said, “Cartesian dualism postulates that the immaterial mind and the material brain, while being ontologically distinct substances, causally interact.”