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'John Lewis: Good Trouble' highlights the civil rights icon's remarkable life

(CNN) "John Lewis: Good Trouble" derives its title from a favorite saying of the civil-rights icon and longtime congressman, but "Being John Lewis" -- and witnessing the effect he has on those who meet him -- might be equally apt. A fitting if slightly disjointed tribute, the CNN Films documentary is somehow both timely and timeless in honoring a man who has spent his entire adult life in the public arena.

"When you see something that is not right ... say something! Do something!" Lewis is shown saying, time and again, in speeches and appearances, counseling his audiences on the periodic need for "good trouble, necessary trouble."

For Lewis, shown in his early 20s as a Freedom Rider, at the March on Washington and walking across the Edmund Pettus Bridge in 1965, that has included enduring beatings by police and dozens of arrests, some of which, he adds wryly, came during his time in Congress.

"The reason why he's effective as a leader is because he's lived it," says the late Elijah Cummings, one of several congressional colleagues -- including Nancy Pelosi, Alexandria Ocasio- Cortez, Rashida Tlaib, Ayanna Pressley, Ilhan Omar and Cory Booker -- who provide perspective and anecdotes, along with Bill and Hillary Clinton.

Much is made, amusingly, of the awe that Lewis inspires among people, recognizing that encountering the 80-year-old legislator is essentially a direct link to some of US history's signature events. An aide quips that walking through an airport with him takes far longer than the actual number of steps required.

Because Lewis became an activist at an early age, his biography is given relatively short shrift. The most salient personal details -- provided in part by Lewis' siblings -- surround his courtship and marriage to his wife, Lillian, who died in 2012.

John Lewis (front right) during the march on the Edmund Pettus Bridge in 1965.

Directed by Dawn Porter ("Bobby Kennedy for President"), the film's strongest asset is inevitably the extensive access enjoyed to Lewis himself, who speaks eloquently about the nation's long road to justice and equality ("We're not quite there yet"), his emotional response to Barack Obama's election and his commitment to fight for what he believes ("As long as I have breath in my body, I will do what I can").

In terms of drawbacks, the film hopscotches around a bit too much, jumping back and forth in time -- a byproduct, perhaps, of the volume of ground there is to cover, a trait also evident in Hulu's recent four-part Hillary Clinton biography, "Hillary."

The filmmakers are also there to observe election night in 2018, capturing the exultation when the Democrats took back the House. That victory aside, the erosion of the Voting Rights Act that Lewis fought to enact in the 1960s is presented as a call to action and a focal point of the work yet to be done.

Beyond previously unseen material, the most intriguing interlude highlights Lewis' 1986 campaign for his Georgia congressional seat, against longtime friend and fellow civil-rights activist Julian Bond. The bare-knuckles nature of that contest temporarily frayed their relationship -- they're shown conducting an awkward interview after the race -- displaying a tougher side to Lewis that offers some balance to his saintly image.

Mostly, though, "Good Trouble" appears content to bask in Lewis' larger-than-life persona, which includes a grandfatherly elder-statesman status that allows him to refer to 47-year-old Beto O'Rourke, the former Texas congressman and presidential candidate, as "this kid."

Lewis -- who is battling pancreatic cancer -- was not much more than a kid when he marched alongside Martin Luther King Jr., and has seemingly lived three lives since then. That's why despite the documentary's uneven aspects, his legacy is ample motivation for any student of history to see "Good Trouble" as a good investment.

"John Lewis: Good Trouble" will be available in select theaters and on demand beginning July 3.

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