Seemingly full of energy after his release, at one point he bounded to a crowd of his countrymen and led them in an enthusiastic national chant.
"I was with God and I was with the devil, but God won," Sepulveda said later in Spanish. "At no point in time did I doubt that God would get me out of there."
The oldest of the miners, 63-year-old Mario Gomez, presented one of the greatest health concerns for officials, but seemed fairly healthy when he happily emerged. Gomez hugged his family as he stepped out of the rescue capsule and, before leaving the site, dropped to his knees and prayed.
Gomez suffers from silicosis, a lung disease caused by breathing in silicone dust during his 50 years in the mines.
Elizabeth Henriquez, whose brother Jose Henriquez still was awaiting his turn for rescue, was beaming as she spoke on "Good Morning America" today.
Through a translator, Henriquez said she couldn't wait for her brother to come out and that the first thing she's going to tell him is that she missed him very much and loves him. She added that she doubted he would want to go back to work in the mine anytime soon.
For the first two to three hours of the operation, officials ran tests of the steel Fenix rescue capsule, including runs up and down the rescue shaft with the capsule empty or containing rescue workers or equipment.
As the initial tests proceeded, rescue workers chanted a modified cheer popularized during Chile's World Cup soccer games: "Vamos, vamos Chilenos, porque esta noche tenemos que ganar," the chant traditionally goes, which translates to, "Come on, come on Chileans, tonight we have to win."
In this case, the end of the chant was being modified to say, "Y los tenemos que sacar," which means, "And we've got to get them out."
ABC News Diana Alvear, Lee Ferran and Bradley Blackburn contributed to this report, as did The Associated Press and Reuters.