How do we know the necessity of spiritual regeneration?

The necessity of spiritual regeneration is emphasized in John 3, particularly verse 3, where Jesus states, 'Except a man be born again, he cannot see the kingdom of God.' This indicates a profound transformation must occur within an individual, imparted by God's sovereign will and the work of the Holy Spirit. Without being born of God, as mentioned in John 1:13, we remain in our natural state, blind to the realities of God's kingdom. Regeneration is not merely a decision made by the individual; rather, it is a divine work that grants spiritual life and insight that allows one to understand and embrace the gospel.