Had Had
It's a sentence about someone's faith that had had no effect on his life. Like when your dad says he's going to heaven, but he still eats pizza and doesn't care.
'He had had faith he'd go to heaven.' 'He still eats pizza, so he's definitely not going.'
'His faith had had no effect on his life.' 'He still eats pizza at 2 a. m. every day.'
'He had had a lot of faith.' 'But he still eats pizza.'