The life of inner peace, being harmonious and without stress, is the easiest type of existence.

The line distills a central theme in Peale’s popular “positive thinking” spirituality: that psychological and spiritual harmony reduces the felt burden of living. “Easiest” does not necessarily mean free of external hardship; rather, it suggests that inner composure—achieved through faith, disciplined thought, and emotional self-regulation—prevents ordinary challenges from escalating into chronic strain. The claim also carries a practical, almost therapeutic implication: stress is not only produced by circumstances but by the mind’s friction with them. In this view, cultivating inner peace is a form of efficiency, conserving energy otherwise spent on anxiety, resentment, or inner conflict.