get religion

get religion idiom
Be converted; also, decide to behave in an upright, ethical way. For example, After the children were born, John got religion and joined the church, or After years of total selfishness, she suddenly got religion and is doing all kinds of volunteer work. [Second half of 1700s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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