How do we know the doctrine of the new birth is true?

The doctrine of the new birth is affirmed through Scripture, particularly in John 3 where Jesus emphasizes its necessity for entering God's Kingdom. Jesus uses examples and teachings, like His conversation with Nicodemus, to illustrate the spiritual regeneration required for salvation. The account of the woman at the well in John 4 further exemplifies this doctrine, wherein through her encounter with Christ, we observe the transformative nature of the new birth. The personal testimonies and the experiential nature of conversion in the lives of believers throughout biblical history corroborate the doctrinal assertion of the new birth as a vital aspect of authentic faith.