It is invariably a shock to evangelical Christians to hear or read about someone who has turned his back on the "faith, which was once delivered unto the saints." The quick justification from most believers of such an announced occurrence will be to piously point out that anyone who turns away from Christ was never a real believer to begin with. Or as an insider might say it, "He was never born again."
Read the rest at https://articles.exchristian.net/2002/04/sabbatical-or-my-anti-testimony.php