This Sunday, Oprah and Iyanla Vanzant are sitting down for part two of their conversation about how Iyanla was able to find the light in the darkest moments of her life.

In her book, Peace from Broken Pieces, Iyanla writes about a time where she and Oprah had a falling out. Read an excerpt about that period in Iyanla's life, then tune in Sunday at 11 a.m. ET/PT on air and online when her conversation with Oprah continues on "Super Soul Sunday."

Chapter 9: Pushed to the Breaking Point

There was a period of about three years in which I simply was not fully present to what was going on within me or around me. The re-release of Acts of Faith, coupled with the simultaneous release of two new books, In the Meantime and One Day My Soul Just Opened Up, took my work to the New York Times bestseller list and put me in such demand that I was traveling four or more days a week, every week, month after month for more than two years.

And it was during this time that Spirit and I became all but strangers. On most days, I lost track of my spiritual practices and my faith. I prayed and I meditated, but I was no longer sure what I believed or how I felt about what I believed. The thing that saved me and kept my faith alive was when I sat to write, stood before an audience to speak, or coached another person, I could feel the living presence of Spirit in my being. These were the times when the failure of my marriage and my feelings of unworthiness didn't matter. When I was on purpose, doing my work, I knew without a shadow of doubt that God had my back. Yet, for some reason, I slipped out of the Presence when it came to handling my personal life. Then, in the midst of my human madness of living out my personal lie, I got the telephone call that would change my life forever. I was invited to be a guest on The Oprah Winfrey Show.

Read more of Piece From the Broken Pieces here

This Sunday, Oprah's conversation continues with bestselling author and spiritual teacher Iyanla Vanzant. Iyanla opens up about how she came back from the brink of suicide and survived her daughter’s tragic death. Watch a preview.

Tune in to "Super Soul Sunday" September 16 at 11 a.m. ET/PT on OWN. You can also watch from anywhere in the world on Oprah.com, Facebook.com/owntv or Facebook.com/supersoulsunday.

In 1953, Iyanla Vanzant was born in a taxicab parked under a Brooklyn elevated train. "Things have always moved very rapidly in my life," she says. "Very rarely has my life been still or quiet."

Her mother, an alcoholic, died when she was two years old. Iyanla was sent to live with her grandmother, whom she says abused her. "My grandmother beat me with an ironing cord until all the skin came off my back," she says. Her father and stepmother removed her from her grandmother's home when she was five years old. Still, her childhood was filled with fear. She was raped at age 9, gave birth at age 13 and was a mother of three by the time she was 21.

One day, while riding the bus, she saw an ad for a local college and enrolled. She graduated and went on to law school, spending three years as a public defender in Philadelphia before finding a higher calling.

Today, Iyanla is known as an author, relationship expert and spritual teacher, but Iyanla says it took her many years to find inner peace. Watch parts of her soul-to-soul conversation with Oprah and learn more about how Iyanla Vanzant overcame her past to become who she is today.

Iyanla Vanzant wasn't always her name. In fact, she was born Rhonda Harris. Watch as she explains who Rhonda was and why she renamed—and reinvented—herself:



The daughter of a woman who had two children with a married man, Iyanla says she bore a burden of guilt since she was in the womb. Watch as Iyanla opens up about how she carried that guilt throughout her life—and how she broke the cycle:



Today, Iyanla says she can "smell a lie" because she was untruthful in her own life for so long. Find out how Iyanla says she developed her gift for hearing beneath the words people speak to get to the real root of the issue:



Iyanla says hardships helped shape who she is today. Watch as Iyanla explains why we're all called to a special life task—and how to surrender to that purpose:

In 1998, Iyanla Vanzant took The Oprah Winfrey Show by storm, gracing Oprah's stage 20 times and talking to Harpo Studios about developing her own show. In 1999, Iyanla was approached by another television executive about a show and chose to accept the offer.

For 11 years, Oprah and Iyanla didn't speak—until a 2011 Oprah Show conversation that set the record straight for both of them. (Click here to watch the full episode.)

Watch as Oprah and Iyanla reflect on that conversation and how they learned all things—even hardships—are divine lessons:



Today, Oprah and Iyanla have come together with a groundbreaking new show called Iyanla: Fix My Life, premiering on OWN September 15 at 10/9c. "When I saw the first episode, I said to myself that's the best thing I have ever seen on television," Oprah says. "And that includes my 25 years of doing it."

While filming the show, Iyanla sent Oprah an e-mail that brought her to tears. Watch as Oprah reads part of that letter and shares why it touched her so deeply: