EXCLUSIVE: Joan Lunden shares the biggest lesson she's learned from having cancer

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EXCLUSIVE: Joan Lunden Reflects on the Biggest Lesson Cancer Has Taught Her

Former Good Morning America co-host Joan Lunden opens up on Oprah: Where Are They Now? about her battle with cancer.

In 2014, Lunden announced that she'd been diagnosed with breast cancer, and shared her journey in hopes of inspiring others facing similar troubles.

WATCH: Celebrities Who've Bravely Battled Breast Cancer

In this exclusive clip, the 65-year-old reporter and TV personality says the best lesson she's learned from her battle with cancer is "the healing power of support."

See more photos of Joan Lunden through the years:

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EXCLUSIVE: Joan Lunden shares the biggest lesson she's learned from having cancer
GOOD MORNING AMERICA - Former GMA host Joan Lunden talks about her new series, 'Taking Care With Joan Lunden' on 'Good Morning America,' 11.22.10, airing on the ABC Television Network. (Photo by Heidi Gutman/ABC via Getty Images) JOAN LUNDEN
"Good Morning America" co-hosts Joan Lunden, center, and Charles Gibson, right, wipe tears from their eyes as Celine Dion, left, sings to Lunden on the set of the show Friday, Sept. 5, 1997, in New York. Lunden said goodbye Friday after nearly 18 years as host of the ABC morning television program. She was able to hold back the tears until Dion serenaded her with ``Because You Loved Me.'' (AP Photo/Michael Schmelling)
(L-R) TV personalities Joan Lunden, Ted Koppel and Barbara Walters. (Photo by Ann Clifford/DMI/Time Life Pictures/Getty Images)
NEW YORK CITY - APRIL 14: TV journalist Barbara Walters and TV journalist Joan Lunden attend the International Radio & Television Society Honors Louis P. Weiss on April 14, 1993 at the Waldorf-Astoria Hotel in New York City. (Photo by Ron Galella, Ltd./WireImage)
Barbara Bush makes a point upon entering a gala dinner at the Plaza Hotel on Tuesday, May 7, 1991 in New York with her daughter-in law, Sharon, left, the wife of her son Neil, and the emcee Joan Lunden, right. The affair benefits the Karitas Foundation, founded by Sharon Bush , that raises money for homeless and abused children.(AP Photo/Chrystyna Czajkowki)
NEW YORK, NY - SEPTEMBER 23: Joan Lunden attends the 2013 Children's Foundation Hero Awards Gala at The Edison Ballroom on September 23, 2013 in New York City. (Photo by Rommel Demano/Getty Images)
UNITED STATES - MARCH 18: Lunden Joan (Photo by The LIFE Picture Collection/Getty Images)
NEW YORK, NY - SEPTEMBER 23: (L-R) Holland Taylor and Joan Lunden attend the 2013 Children's Foundation Hero Awards Gala at The Edison Ballroom on September 23, 2013 in New York City. (Photo by Rommel Demano/Getty Images)
TV personality Joan Lunden and children (L-R) Sarah and Lindsay w. Snow White. (Photo by Robin Platzer/Twin Images/Time Life Pictures/Getty Images)
GOOD MORNING AMERICA - Former GMA host Joan Lunden talks about her new series, 'Taking Care With Joan Lunden' on 'Good Morning America,' 11.22.10, airing on the ABC Television Network. (Photo by Heidi Gutman/ABC via Getty Images) JOAN LUNDEN
NEW YORK CITY - APRIL 14: TV journalist Joan Lunden, talent agent Louis P. Weiss, TV journalist Barbara Walters and comedian Alan King attend the International Radio & Television Society Honors Louis P. Weiss on April 14, 1993 at the Waldorf-Astoria Hotel in New York City. (Photo by Ron Galella, Ltd./WireImage)
GOOD MORNING AMERICA - For 20 years Joan Lunden hosted GOOD MORNING AMERICA. This morning she returned to GMA to talk about her new projects, 5/5/10 airing on the ABC Television Network. GM10 (Photo by Ida Mae Astute/ABC via Getty Images) ROBIN ROBERTS, JOAN LUNDEN
TV news anchor Joan Lunden (front-C) wearing camouflage makeup & gear as she poses w. group of Navy SEALS, in publicity still for TV special Behind Closed Doors w. Joan Lunden (Photo by Time Life Pictures/US Navy/Time Life Pictures/Getty Images)
(L-R) Joan Lunden and Sarah Ferguson. (Photo by Marion Curtis/DMI/Time Life Pictures/Getty Images)
UNITED STATES - MARCH 18: Lunden Joan (Photo by The LIFE Picture Collection/Getty Images)
TV personality Joan Lunden & producer husband Michael Krauss at unident. event. (Photo by Ann Clifford/DMI/Time Life Pictures/Getty Images)
News anchors Joan Lunden, left, and Barbara Walters arrive at Good Morning America's 30th anniversary cocktail party at Lincoln Center in New York, Tuesday, Oct. 25, 2005. (AP Photo/Shiho Fukada).
ABC's "Good Morning America" anchors Diane Sawyer, left, Charles Gibson, center, and former anchor Joan Lunden, arrive at Good Morning America's 30th anniversary cocktail party at Lincoln Center in New York Tuesday, Oct. 25, 2005. (AP Photo/Shiho Fukada).
Barbara Bush entering a gala dinner at the Plaza Hotel in New York Tuesday, May 7, 1991 with her daughter-in-law, Sharon, left, the wife of her son Neil, and the emcee Joan Lunden, right. The affairs benefits the Karitas Foundation, founded by Sharon Bush, that raises money for abused and homeless children. (AP Photo/Chrystyna Czajkowki)
UNITED STATES - MARCH 18: Lunden Joan (Photo by The LIFE Picture Collection/Getty Images)
UNITED STATES - MARCH 18: Lunden Joan (Photo by The LIFE Picture Collection/Getty Images)
UNITED STATES - MARCH 18: Lunden Joan (Photo by The LIFE Picture Collection/Getty Images)
TV journalist Joan Lunden giving a pep talk to her young daughter Sarah who is clad in riding togs & helmet as she prepares to ride in the 1992 Hampton Classic horse show which is a benefit for Southhampton Hospital & the US Equestrian Team. (Photo by Kimberly Butler//Time Life Pictures/Getty Images)
HOME IMPROVEMENT - Joan Lunden from 'Good Morning America' Visits the Set - Shoot Date: March 12, 1993. (Photo by ABC Photo Archives/ABC via Getty Images) RICHARD KARN;JOAN LUNDEN;TIM ALLEN
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For Lunden, a lot of that support comes from her family, and she reveals how she came to the decision to talk to her children about her diagnosis.

NEWS: Former GMA Host Joan Lunden Diagnosed with Breast Cancer

"I didn't want my kids to be scare scared, but we were advised [to] tell the kids," Lunden shared. "Family secrets are dangerous, you can have trust issues later in life, the unknown is much scarier than the known [and] they're going to sense something."

Check out the emotional interview when Oprah: Where Are They Now? airs Feb. 13 at 10 p.m. ET/PT on OWN.

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