Maria Tatar is the John L. Loeb Professor of Germanic Languages and Literatures at Harvard University, where she also chairs the Program in Folklore and Mythology. Her books include “Enchanted Hunters: The Power of Stories in Childhood” and “The Annotated Brothers Grimm.” This interview is edited and produced with music and other features in the On Being episode “Maria Tatar — The Great Cauldron of Story: Why Fairy Tales Are for Adults Again.” Find more at onbeing.org.

Fairy tales don’t only belong to the domain of childhood. Their overt themes are threaded throughout hit TV series like “Game of Thrones” and “True Blood,” “Grimm” and “Once Upon a Time.” These stories survive, says Maria Tatar, by adapting across cultures and history. They are carriers of the plots we endlessly re-work in the narratives of our lives — helping us work through things like fear and hope.

Jaroslav Pelikan was professor of history at Yale University for four decades. He authored many books “Christian Tradition: A History of the Development of Doctrine” and “Credo.” This interview is edited and produced with music and other features in the On Being episode “Jaroslav Pelikan — The Need for Creeds.” Find more at onbeing.org.

The idea of reciting an unchanging creed sounds suspicious to modern ears. But the late, great historian Jaroslav Pelikan illuminated ancient tradition in order to enliven faith in the present and the future. He insisted that strong statements of belief will be necessary if pluralism in the 21st century is to thrive. We take in his moving, provocative perspective on our enduring need for creeds.

Avivah Zornberg is a scholar of Torah and rabbinic literature, and author of several books including “The Particulars of Rapture: Reflections on Exodus.” This interview is edited and produced with music and other features in the On Being episode “Avivah Zornberg — The Transformation of Pharaoh, Moses, and God.” Find more at onbeing.org.

With a master of midrash as our guide, we walk through the Exodus story at the heart of Passover. It’s not the simple narrative you’ve watched at the movies or learned in Sunday school. Neither Moses or Pharaoh, nor the oppressed Israelites or even God, are as they seem. As Avivah Zornberg reveals, Exodus is a cargo of hidden stories — telling the messy, strange, redemptive truth of us as we are, and life as it is.

Janna Levin is an astrophysicist and writer. She has contributed to an understanding of black holes, the cosmology of extra dimensions, and gravitational waves in the shape of spacetime. She is the author of “A Madman Dreams of Turing Machines,” which won the PEN/Bingham prize. This interview is edited and produced with music and other features in the On Being episode “Janna Levin — Mathematics, Purpose, and Truth.” Find more at onbeing.org.

An astrophysicist who studies the shape of the universe, Janna Levin has also explored her science by writing a novel about two pivotal 20th-century mathematicians, Kurt Gödel and Alan Turing. Both men pushed at boundaries where mathematics presses on grand questions of meaning and purpose. Such questions, she says, help create the technologies that are now changing our sense of what it means to be human.

Desmond Tutu is an Anglican archbishop emeritus of Cape Town, South Africa and recipient of the Nobel Peace Prize. He has written many books, including, “Made for Goodness: And Why This Makes All the Difference,” and “The Book of Forgiving.” This interview is edited and produced with music and other features in the On Being episode “Desmond Tutu — A God of Surprises.” Find more at onbeing.org.

“There’s no question about the reality of evil, of injustice, of suffering, but at the center of this existence is a heart beating with love.”

South African Archbishop Emeritus Desmond Tutu on how his understanding of God and humanity has unfolded through the history he’s lived and shaped.