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Jan Williams has gone to Maranatha Baptist Church in Plains, Georgia, with former President Carter for decades. 

When Carter started teaching Sunday school every week, Williams noticed the church getting more crowded. 

"We saw that a lot of people were going to be coming," Williams said. "And we started getting more and more every Sunday."

So many people started coming that visitors had to show up the day before services to reserve their seats. 

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Jimmy Carter

Former President Carter used to teach Sunday school at Maranatha Baptist Church. (Fox News)

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"People would have to come here on Saturday afternoon, get a number, drive back in the parking lot, could not leave and then they would spend the night in their car," Williams said.

Maranatha Baptist Church in Plains, Georgia

Maranatha Baptist Church is located in former President Carter's hometown of Plains, Georgia. (Fox News)

Williams emphasized that church was a huge priority for President Carter. 

He did everything he could to be there every Sunday and spread the word.  

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Jimmy Carter taught lessons about everyday life

Former President Carter focused on teaching lessons that could be applied to everyday life (Fox News)

"He tried his best at all times to plan trips away from Plains during the week, so he could return on the weekend," Williams said. "To be here, for his church service." 

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In his teachings, Carter focused on lessons that could be applied to everyday life. 

"When you walked out of our church, you could go use that in the days ahead," Williams said.