In the final part, Josh takes up methodology and the question of mood-altering medicine, concluding that only Scripture "provides an authoritative framework for understanding and addressing the problems of the human soul."

Why do people struggle, and how is true, lasting change accomplished? In Part 2, Josh examines etiology and transformation — and why only God's Word gets to the heart of our troubles.

What is the relationship between secular psychology and biblical counseling? Are they compatible? In this series, Josh Greiner argues that biblical counseling offers "genuine heart transformation that glorifies God and prepares His people for eternity."