In a physical sense, we are born once through our parents. Spiritually, we are born again (or reborn) by the Holy Spirit, through Jesus.
Although used frequently in some circles, the phrase born again only occurs a few times in the Bible: John 3:3-4, John 3:7, 1 Peter 1:3, and 1 Peter 1:23.
Key verse about Born Again: For you have been born again, not of perishable seed, but of imperishable, through the living and enduring word of God (1 Peter 1:23, NIV).
A lifelong student of the Bible, Peter DeHaan, PhD, wrote the 1,000-page website ABibleADay.com to encourage people to explore the Bible. His main blog and many books urge Christians to push past the status quo and reconsider how they practice their faith in every area of their lives.