Former GOP presidential candidate Rick Santorum believes letting young people know the “truth” about marriage will dissuade them from supporting marriage equality.

Santorum made his comments during an interview with CBN's David Brody of The Brody Files.

“How concerned are you that when you see those 18-34 year old demographics and the percentages of people who support or say they support same-sex marriage that the train may be leaving the station and that there's not much people think they can do about it,” Brody asked.

“What I've always found, and I've traveled to many a college and universities, some of the most liberal campuses in America, where the fount of this movement is,” Santorum answered. “What I found is that shinning light and shinning truth has still a very strong affect.”

At Yale “the response was remarkable.”

“People coming up to me saying, 'You know, I never really thought about that. Never understood the consequences. No one ever sat down and laid out the truth about what the consequences are of changing a foundational institution.'”

“So, I just think we have to stand by the truth. It is nature. The idea that two people who are not a man and a woman can get married is against nature. It is simply is not true. It's not traditional.”

“Marriage is about a bond. A firm solid bond of a man and a woman to provide a foundation upon which to raise the next generation of Americans. That's marriage. And no other marriage formulation can do that. It's impossible,” he said.

Santorum added that if marriage was about love, then “any three or four people” can get married. (The video is embedded on this page. Visit our video library for more videos.)