Tony Robbins, life coach and author, says no one is immune to life's hardships. Even the most powerful people in the world need advice during trying times.

"I am really in the breakthrough business. I help people to find a way to break through from where they are to where they want to be," Robbins tells Inc. editor-in-chief Eric Schurenberg in an Idea Lab video. "That's why people come to me, because they're hungry, that's their nature. They're the best in the world at what they do and always looking for the edge."

Others, he says, come to him when they're in a slump and need to turn things around. For example, when Serena Williams is "burning down on national television," she calls him to align her drive with what she wants to accomplish, helping her to break through what's tripping her up.

One of Robbins's most important calls came in the late 1990s from the most powerful person in the free world at the time. President Clinton, he says, called him for advice the night before he was impeached.

"Because I've been put in those environments I've learned very quickly how to get inside somebody's brain, figure out what limits them, break through and move them on so they're no longer in their own way, and maximize their performance," Robbins says.

Watch the full video below and catch the entire series here.