65:8.4

As mind evolution is dependent on, and delayed by, the slow development of physical conditions, so is spiritual progress dependent on mental expansion and unfailingly delayed by intellectual retardation. But this does not mean that spiritual evolution is dependent on education, culture, or wisdom. The soul may evolve regardless of mental culture but not in the absence of mental capacity and desire—the choice of survival and the decision to achieve ever-increasing perfection—to do the will of the Father in heaven. Although survival may not depend on the possession of knowledge and wisdom, progression most certainly does.