Bible passages such as 1 Thessalonians 5:23 indicate that humans are both physical and spiritual. We consist of a physical nature (our bodies) and a spiritual nature (our spirit). The physical body makes sense, but how can we understand the spiritual? How can we have two human components of spirit and body?
In quantum mechanics, things like photons (light), electrons, protons, and neutrons are governed by principles that are very different from the familiar physical world. In some experiments, these subatomic particles behave like particles, but they act like waves in other experiments.
In 1924, French physicist Louis de Broglie introduced wave-particle duality. That is the idea that any matter, whatever its size, has an associated wavelength. Photons can knock electrons out of a material in the photoelectric effect used to generate electricity from light energy. That process requires light to have physical properties because only particles can move other particles. In a different experiment, photons show diffraction properties explainable only if photons are waves. Electrons produce the same effects as light, yet we can measure their mass. How can they be both particles and waves?
There is also a principle of complementarity in quantum mechanics. It tells us that the result of an observation is dependent on the focus of the observer. In other words, in experiments when our attention focuses on one variable, this precludes the simultaneous observation of its complement. Wave and particle-related properties are complementary variables. We can’t observe both at the same time.
The Bible presents the notion that body, soul, and spirit are not separate entities, but they are distinct dimensions of a person. Although we are one person, we understand that we have two human components of spirit and body. The presence of these dimensions means that we are capable of dual behavior.
Understanding quantum mechanics allows us to understand this duality. Ranjit Thuraisingham, a research scientist, describes it this way: “The science of quantum objects teaches us why we fail to discern this spiritual dimension in ourselves. In quantum objects, focusing only on one variable precludes the observation of the complementary variable. Thus, the absence of observing the spiritual is related to our focus solely on the material.”
In other words, we struggle with our spiritual nature because of our fixation with the material world in which we live. In Galatians 5:16-26, Paul distinguishes between the actions of the spirit and the flesh (body). The actions of the spirit include love, joy, and patience. The actions of the flesh are immorality, hatred, and envy. As in quantum mechanics, we can’t focus on one without losing sight of the other. When we understand the two human components of spirit and body, it becomes clear why our actions are not what they should be.
— John N. Clayton © 2020
Reference: “On the Duality of Human Nature and the Behavior of Quantum Particles” by Ranjit A. Thuraisingham