NIAGARA FALLS, N.Y. -- Nik Wallenda can’t visit a new place without envisioning a wire strung high above his head: Linking buildings, landmarks, nations. Even as a 6-year-old at Niagara Falls with his parents, he pictured walking a tightrope over the raging, whitewater maw.

Now 33, he’s ready to live out that childhood fantasy when he attempts Friday to become the first person ever to walk a tightrope directly over the brink of Niagara Falls.

“It’s just natural,” Wallenda, a seventh-generation member of the famed Flying Wallendas, explained. “When I drive into a city, I’m always thinking, ‘It would be cool to do a walk there.’ It’s just the way I think and always have.”

The daredevil is youthful and athletic, solidly built from gym workouts and a lifetime of training. But it’s the mental element, trusting in his skill and tuning out the potential danger, that can mean the difference between success and failure.

“You can either talk yourself out of doing something or you can talk yourself into doing something,” he said.

He’ll be wearing a safety device, a tether insisted on by ABC, which will televise the walk.

Since first stepping on a wire when he was 2, Wallenda, who lives in Sarasota, Fla., has earned six Guinness records. His family has been performing for audiences at circus-style shows for more than 200 years.

The Niagara Falls walk set for Friday night, above a nearly 200-foot drop and through potentially high winds and vision-obscuring mist, will be unlike anything he’s ever done. Because it’s over water, the 2-inch wire won’t have the usual stabilizer cables to keep it from swinging. Pendulum anchors are designed to keep it from twisting under his elkskin-soled shoes on the 1,800-foot walk from the U.S. shore to Canada.

“The thing about this cable, it’s unique to me even, and because of that I’ll be very, very focused on it,” he said.

A born-again Christian, Wallenda said he stays calm on the wire by talking to God, quoting scripture and praying. He also stays in touch with his father and chief rigging engineer, Terry Troffer, through an earpiece.

And unlike his usual antics – Wallenda’s been known to make phone calls and lie down on the wire mid-walk – he may be more inclined to get from one side to the other as quickly as possible, a request from his 11-year-old son.

“You can tell he is a little bit nervous about it,” said Wallenda, whose three children are normally so comfortable with what he does that he once spied his two boys playing Nintendo games while he walked 200 feet above them over the Allegheny River in Pittsburgh. Wallenda’s acrobat wife, Erendira, traces her own circus blood eight generations deep on her mother’s side and seven on her father’s.

“I always give (the kids) a hug and a kiss before I do anything,” said Wallenda, “but they’re used to it in a lot of ways.”

About a dozen other tightrope artists have crossed the Niagara Gorge downstream, dating to Jean Francois Gravelet, aka The Great Blondin, in 1859. But no one has walked directly over the falls and authorities haven’t allowed any tightrope acts in the area since 1896. It took Wallenda two years to persuade U.S. and Canadian authorities to allow it.