informalBe converted to religious belief and practices:he got religion and gave his money to the poor...
When he got religion, it was framed as a rejection of the rest of his career, and he had to backpedal or move on (depending on how you look at it), before he had a chance to speak to his wider audience again.
Billboards used to ask us to get religion and go to ‘the church of [our] choice.’
Many people in rehab, and in defeat, get religion.