What keeps a good teacher from becoming exhausted, rigid, or even “sour”? Thesa Callinicos has spent more than fifty years in Waldorf education as a teacher, artist, school founder, mentor, and teacher educator. In this deeply personal conversation, she reflects on the experiences that shaped her and on what allows a teacher to struggle without losing creativity, humanity, or joy. Her story begins in a Greek family in Johannesburg and leads through Emerson College, communal life in America, motherhood, the founding of a pioneering school in rural Colorado, teaching in Hawaii, and decades of mentoring younger educators. We also discuss: • Growing up amid South African inequality• Language, poetry, music, Theosophy, and Thesa’s first spiritual questions• Why Waldorf education felt more alive and humane than conventional schooling• Founding a school while raising a young family• The balance between structure, freedom, discipline, and inspiration• Teacher relationships, criticism, courage, and healthy school culture• The fourfold understanding of the human being• Nature, rhythm, safety, imagination, and children’s development• Art and creativity as essential parts of education• Protecting teachers’ health, family life, and long-term vitality• Avoiding burnout, spiritual competition, and becoming “sour”• Why human connection matters in the age of artificial intelligence• Reflection, meditation, and reviewing the day backwards• Struggle as part of teaching and joy as a gift Voices of Waldorf Elders is an independent oral-history project preserving the life stories and hard-earned wisdom of longtime Waldorf educators. Created and hosted by Roel op ’t Ende, a Waldorf class teacher, teacher mentor, and teacher educator with Gradalis Waldorf Teacher Education. Roel is also a student in the Kairos Institute’s Art Therapy training program. Support the project:https://ko-fi.com/voicesofwaldorfelders