IFS Talks

Uncertainty and Mental Health with Sarah Bergenfeld and Martha Sweezy

IFS Talks

Show Notes

We are excited to celebrate the launch of IFS Collected Wisdom: Conversations with Experienced Voices in Internal Family Systems a book that brings together voices, reflections, and lived experience from across the IFS community. This book was created from a desire to honor those voices, and to acknowledge that wisdom in IFS doesn’t live in one place or one person. It lives in relationship, in experience, and in the field as it evolves. Thank you for being a listener, for being part of this community, and for continuing to explore what becomes possible when Self leads. We hope that IFS Collected Wisdom can become a companion in your IFS journey. Here is a link to the IFS Collected Wisdom book contents.

The Role of Uncertainty in Mental Health with Sarah Bergenfeld and Martha Sweezy In this episode, we welcome two leading voices in Internal Family Systems therapy for a conversation that bridges neuroscience, sensory experience, and healing. Sarah Bergenfield is a certified Level 3 IFS practitioner, writer, and educator specializing in autistic individuals and couples. Autistic herself, Sarah weaves together IFS, polyvagal theory, predictive processing, and sensory science in her clinical and consultation work. She teaches internationally for clinicians working with neurodiverse clients, and her work reframes autism not as a deficit, but as a condition of sensory surplus. Martha Sweezy is an assistant professor of psychiatry at Harvard Medical School, program consultant and supervisor at the Center for Mindfulness and Compassion at Cambridge Health Alliance, and a psychotherapist in private practice in Northampton, Massachusetts. She teaches IFS nationally and internationally and has authored and co-edited numerous books on the model, including Internal Family Systems Therapy, Second Edition (with Richard Schwartz), Intimacy from the Inside Out (with Toni Herbine-Blank), and Internal Family Systems Therapy for Shame and Guilt. Together, Sarah and Martha are co-authors of Wired to Feel: Autism as a Condition of Sensory Surplus. In this episode, we explore the role of uncertainty in mental health: how it can quietly drive distress and shame, and how IFS offers a path toward resolution. While the conversation has special relevance for autistic systems, the insights apply across all neurologies.

More from IFS Talks

Sep 23, 2026

In this episode, we sit with Cece Sykes, LCSW, a leadi trainer at the IFS Institute with over forty years of clinical experience in trauma and addiction recovery, to explore one of the most distinctive and challenging aspects of the IFS model: how therapists actually help clients find their way to Self.

Sep 6, 2026

In this episode of IFS Talks, Nancy Sowell, Martha Sweezy, and IFS founder Richard Schwartz join us to explore their new book, IFS Health Therapy: Treating Trauma-Related Physical Illness & Toxic Stress.

Jul 31, 2026

In this special episode of IFS Talks, we welcome Richard C. Schwartz, Martha Sweezy, David Lovas, and Sunny Strasburg, authors of Psychedelic Medicine and Internal Family Systems Therapy: A Clinical Skills Manual. Together, we explore why IFS and psychedelic-assisted therapy can be naturally complementary, and why the medicine itself is only one part of the therapeutic process. Our guests discuss the importance of preparation, respect for protectors, internal consent, careful pacing, therapeutic presence, clinical safety, and ethical practice. The conversation examines how therapists can distinguish Self-energy from altered or dissociative states, decide when to intervene during challenging experiences, and respond to fear, overwhelm, shutdown, and protector backlash. We also consider sensitive questions concerning touch, boundaries, therapist readiness, personal experience with psychedelic medicines, and the assessment of clients for whom this work may not yet be safe. Finally, we turn to integration: how IFS can help people make sense of psychedelic experiences, reconnect with every part of their system, and translate insight into meaningful and sustainable change. We believe this is a thoughtful and clinically grounded conversation about the possibilities of bringing IFS and psychedelic medicine together, without losing sight of humility, consent, safety, and respect for the client’s inner healing intelligence. This episode is intended for educational purposes only and does not constitute medical advice or encourage the use of psychedelic substances outside appropriately qualified, ethical, and legal settings. We are excited to celebrate the launch of IFS Collected Wisdom: Conversations with Experienced Voices in Internal Family Systems a book that brings together voices, reflections, and lived experience from across the IFS community. This book was created from a desire to honor those voices, and to acknowledge that wisdom in IFS doesn’t live in one place or one person. It lives in relationship, in experience, and in the field as it evolves. Thank you for being a listener, for being part of this community, and for continuing to explore what becomes possible when Self leads. We hope that IFS Collected Wisdom can become a companion in your IFS journey. Here is a link to the IFS Collected Wisdom book contents.

Apr 27, 2026

In this episode, we explore the nature of grief through the lens of Internal Family Systems (IFS) with senior trainer Einat Bronstein. Drawing on the work of Francis Weller and other key grief theorists, we reflect on grief not as a problem to solve, but as a deeply human experience that calls for presence, witnessing, and integration.

Feb 28, 2026

Today on IFS Talks, we’re excited to welcome Lisa Spiegel and Claire Stubbs. Lisa is the founder of Soho Parenting in New York City. She’s an author and a certified IFS therapist and consultant who has worked with children and families for over 40 years and teaches therapists around the world.

See all episodes →