John Lewis will go down in history as the founding father of a better America, former president Barack Obama said during powerful eulogy to the civil rights hero.
Mr Obama was the fourth former president to deliver remarks at the funeral after Bill Clinton and George W Bush spoke, and a letter from Jimmy Carter was read out, to mourners gathered at Ebenezer Baptist Church in Atlanta.
"The life of John Lewis was in so many ways, exceptional. It vindicated the faith in our founding, redeemed that faith, that most American of ideas," Mr Obama said.
The celebration of Mr Lewis' life turned to the hope for his legacy as Mr Obama used the famous pulpit of MLK to rally support for voting reform ahead of the 2020 election between his former VP Joe Biden and Donald Trump.
Mr Trump was the only recent living president not to make an appearance of some kind at the service, though his actions cast a long shadow over the messages of speakers.
"There are those in power that are doing their darndest to discourage people from voting by closing polling locations and targeting minorities and students with restrictive ID laws and attacking our voting rights with surgical precision, even undermine the postal service, in the run up to an election that's going to be dependent on mail in ballots so people don't get sick," Mr Obama said.
"I know this is a celebration of John's life, there are some who might say we shouldn't dwell on such things. But that's why I'm talking about it. John Lewis devoted his time on this earth fighting the very attacks on democracy, and what's best in America, that we're seeing circulate right now."
Mr Bush and Mr Clinton earlier focused on the life of Mr Lewis and the better future he created for the country.
Mr Bush had mourners in hysterics as he remembered Mr Lewis's early childhood while Mr Clinton spoke about the lessons he has learned from the late congressman.
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Bells rang 80 times to mark the age that Mr Lewis passed, while Former presidents Bill Clinton and George W Bush were among the first to deliver eulogies.
Barack Obama is expected to deliver a eulogy shortly, but in the meantime a letter from Jimmy Carter was read out by Reverend Raphael Warnock.
Former president Jimmy Carter said in his letter delivered to the funeral service:
"Throughout his remarkable life John has been a blessing to countless people and we are proud to be among those who's lives he has touched," he said.
"We Georgians know him as our neighbour, friend and representative. His enormous contributions will continue to be an inspiration for generations to come."
While three ex-presidents attended in person, and Mr Carter contributed with the letter, Donald Trump has indicated he would not be at the funeral.
Earlier, Reverend Warnock invoked the current president as he welcomed mourners to the spiritual home of Mr Lewis, saying they were summoned to honour the civil rights hero as "some in high office" are much better at division than vision.
"In a moment when there is so much political cynicism and narcissism that masquerades as Patriotism, here lies a true American patriot who risked his life and limb for the hope and the promise of democracy," Mr Warnock said.
Mr Bush was the first president to address the funeral, having mourners in hysterics as he recounted Lewis' first non-violent protest of refusing to eat his own "flock" of chickens, who he baptized, married and preached to.
"Every morning he would rise before the sun to attend the flock of chickens. He loved those chickens," Mr Bush said.
"He's been called an American saint, a believer willing to give up everything. Even life itself to bear witness to the truth that drove him all his life. That we could build a world of peace and justice and harmony and love."
Mr Clinton followed Mr Bushed and riffed on his chiken-story, saying that for a fellow who got his start speaking to chickens, Mr Lewis received a finely organized, orchestrated and deeply deserved send-off this week.
"I think it's important that all of us who love him remember that he was after all, a human being. A man like all other humans born with strengths that he made the most of when many don't," Mr Clinton said.
"Born with weaknesses that he worked hard to beat down when many can't. But still a person. It made him more interesting, and it made him in my mind even greater."
He continued: "He got into a lot of good trouble along the way, but let's not forget he also developed an absolutely uncanny ability to heal troubled waters."
"When he could have been angry and determined to cancel his adversaries, he tried to get converts instead. He thought the open hand was better than the clenched fist."
Reverend James Lawson added more context, saying that all the stories about Mr Lewis preaching to his chickens as a young boy were a sign that something else was happening to him in those early years.
"John saw the malignancy of racism in Troy Alabama," he said. "That formed in him a sensibility that he had to do something about it."
Mr Lawson continued: "He did not know what that was but he was convinced that he was called, indeed to do whatever he could do, get in good trouble, but stop the horror that so many folks lived through and in in this country in that part of the 20th century."
Speaker of the House, Nancy Pelosi, meanwhile, held back tears and she remembered the night their friend, mentor and colleague died.
"When John Lewis served with us he wanted us to see the civil rights movement and the rest through his eyes. He told us so many stories, he taught us so much and he took us to Selma," she said. "He wanted us to see how important it was to understand the spirit of non-violence."
She said that while it hadn't rained on his last night at the Capitol as thousands of people showed up to pay their respects, a double rainbow appeared over Mr Lewis's casket.
"We waved goodbye when he started to leave us. He was telling us. He was telling us. I'm home in heaven. I'm home in heaven. We always he knew he was on the side of the angels and now he's with them," she said.
"John Lewis will stand beside Gandhi, and King, and Mandela as one of the great transformative freedom fighters of humankind," said former Atlanta mayor William Craig Campbell.
He continued that Mr Lewis wasn't a civil rights hero, he was a "women's rights hero, a gay rights hero, a senior rights hero, a worker's hero and immigrant rights hero".
"John wasn't on the right side of history, history was on the right side of John Lewis," Mr Campbell said.
While the funeral of John Lewis is being held in Atlanta, the grief is being shared around the world as people tune in online.
"As a staff we are heartbroken, we are lost. But we know that the work continues. The fight remains. We cannot, we must not get lost in this sea of despair," Jamila Thompson said.
Former president Barack Obama will be the fourth past leader of the United States to deliver a message at the funeral of John Lewis.
He will begin shortly after speeches earlier from Bill Clinton, George W Bush, and a letter from Jimmy Carter.
"An American whose faith was tested again and again to produce a man of pure joy and unbreakable perseverance," Mr Obama said.
Speaking about John Lewis's early non-violent civil disobedience sitting at segregated counters and busses set him on a course to take the battle for civil rights deeper.
"John got a taste of jail, for the first, second, third, several times. But he also got a taste of victory and it consumed him with righteous purpose and he took the battle deeper into the south.," he said.
"Imagine the courage, of two people Malia's age, younger, than my oldest daughter, on their own, to challenge an entire infrastructure of oppression. John was only 20 years old. But he pushed all 20 of those years to the centre of the table betting everything, all of it, that his example could challenge centuries of convention and generations of brutal violence and countless daily indignities suffered by African Americans."
"Their bones were cracked with Billy clubs, their eyes and lungs choked with tear gas, they knelt to pray which made their heads easier targets, and John was struck in the skull. He thought he was going to die, surrounded by the sight of young Americans gagging and bleeding and trampled. Victims in their own country of state sponsored violence."
"The life of John Lewis was in so many ways, exceptional. It vindicated the faith in our founding, redeemed that faith, that most American of ideas," Obama said.
"The idea that any of us ordinary people without rank or wealth or title or fame can come how point out the imperfections of this nation and come together and challenge the status quo and decided that it is in our power to remake this country that we love until it more closely aligns with our highest ideals."
"America was built by John Lewises. He as much as anyone in our history brought this country a little bit closer to our highest ideals," Obama said.
"He knew from his own life that progress is fragile, that we have to be vigilant against the darker currents of this country's history. Of our own history. Where there are whirlpools of violence and hatred and despair that can always rise again," Obama said.
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