The passage from John 3 discusses what it means to be "born again." Jesus tells Nicodemus that one must be born of water and spirit to enter God's kingdom. Being born again is a spiritual transformation brought about by God where one receives eternal life through faith in Jesus. It means becoming a child of God and having one's sins forgiven. All have sinned and fall short of God's glory, making us spiritually dead. But through faith in Christ's sacrifice, one receives new spiritual life and is born again.