A phrase from the Department of Redundancy Department, since, by definition, "you must be born again" (i.e. spiritually born, in addition to one's original, natural, birth) to be a Christian, as Jesus told Nicodemus. Became a catchphrase due to the apparent need of evangelical Christians (in their jargon-laden discourse) to differentiate themselves from the US mainstream's rote, lukewarm, Christianity. Unfortunately, many evangelicals are just as rote nowadays.