John Tesh says 'faith-filled' wife saved his life after doctors gave him 18 months to live

John Tesh credited his wife for saving his life as he continues to battle a long-fought war with cancer.Tesh, 73, opened up about his illness and the strength he found in his wife Connie Sellecca."I'm incredibly grateful, because it has been literally a 10-and-a-half-year journey [from] when I was first diagnosed in 2015," he told "Good Morning America."JAMES VAN DER BEEK MAKES SURPRISE APPEARANCE AFTER MISSING 'DAWSON'S CREEK' REUNION AMID ONGOING HEALTH ISSUESTesh recalled receiving his grim p