  The article explores challenges presented by revelations in physics and the
questions they provoke concerning reality. It sheds light on the disparity
between the indefinite nature of quantum reality and our perception of
classical reality. The necessity for transition from the quantum to classical
reality is underscored, alongside difficulties of observer intervention and the
complexities introduced by the objective collapse theory. The work introduces a
pioneering approach of decoherence within the framework of universal wave
function density matrices. It deploys entanglement among three primary quantum
subsystems: mass particles, massless particles, and the human body system. This
gives rise to a Von Neumann chain of correlated systems, wherein neglecting one
system renders the other two in mixed states. Here the cohered massless system
and the animate being constitute subjects of our perceptions. Within the body,
the distributions of quantum particle wave packets are highly localized due to
entanglement and chemical potential, satisfying the Ehrenfest condition,
wherein the thermal deBroglie wavelength scale is considerably smaller than
their domain in the body. Thus, each microstate of the body quantum particle
ensemble can be analogously represented as a statistical mechanics particle
ensemble or likened to microstates in the Debye statistical model. In the
statistical mechanics perspective, life represents a macrostate characterized
by thermodynamics parameters, and chemical potential. The life macrostate
autonomously processes an environment corresponding to a mixed state
alternative of its entangled quantum world counterpart, which appears in the
stream of consciousness. The quantum universe persists, evolving
deterministically, and the classical (macroscopic) universe is its realization
statistical by the fundamental predicate of life discerned by the brain; our
elusive world.
