U.S. Secretary of State Hillary Clinton suggested Wednesday that, after she leaves her post in 2013, she wants to explore possibilities in the academic realm, although she feels that "all doors are open" in the future, according to an interview broadcast Wednesday by ABC.

Clinton told ABC's Barbara Walters that she will resign as secretary of state once President Barack Obama, who will be inaugurated for his second term in January, selects a new person for the post and they are sworn in.

"It sounds so simple, but I've been, as you know, at the highest levels of American and now international activities for 20 years, and I just thought it was time to take a step off, maybe do some reading and writing and speaking and teaching," said Clinton.

When asked by Walters, Clinton said that she does not have a specific plan in mind for once she leaves the State Department although she said she wants to keep contributing to society in some way, possibly in philanthropy or academia.

When pressed about rumors that she might run for president in 2016, Clinton said that she does not plan to do so. "I've said I really don't believe that that's something I will do again," she said. "I am so grateful I had the experience of doing it before."

Clinton, 65, said she was grateful for her good health and her "incredible stamina and energy," but she added that after being in politics in Washington for 20 years she feels it's time to try something new.

Clinton has visited 112 countries since she assumed the post of secretary of state almost four years ago. EFE