Thanks . In answer to your question Nigel ,I'm sure you won't be surprised that I would say ultimately I believe it is God and my Christian faith. I would add that I believe His strength in my weakness is displayed by family and friends too , that send kind thoughts and offer prayers , not the least of which being the crew of this fine ship.                         Tommy seems better today than yesterday , and though we've been told again not to expect him to live another year , we don't give up hope .            Blessings.          Pete.