What does the Bible say about prosperity of the soul?

In 3 John 1, the apostle John expresses his desire for Gaius to prosper and be in health, even as his soul prospers. This highlights a significant biblical principle: the prosperity of one's soul is far more crucial than physical well-being. While many may desire physical healing and prosperity, John indicates that the soul's condition should take precedence. Spiritual health must be the foundation upon which any physical blessings are built. Indeed, if a person is physically healthy but spiritually impoverished, they are in a dire state.