This conceptual article focuses on the notion of perezhivanie -- a teacher's unique way of experiencing classroom events through the dynamic interaction of emotions, cognition, and environmental factors -- and discusses its application to the professional growth of TESOL (Teaching English to Speakers of Other Languages) teachers. To achieve such growth, teachers must acquire new knowledge and skills while simultaneously critically reflecting on their practice, as professional learning arises from reflecting on experiences. Furthermore, critical reflection must consider the emotions associated with teachers' experiences as professionals, as these substantially impact how teachers make sense of their lived experiences and disseminate their narratives. The article begins by defining the concept of perezhivanie, bridging psychology and English language education. It examines how perezhivanie intersects with TESOL teachers' professional growth through lived and transformative experiences, all of which are situated within emotionally-, empathetically-, culturally-, and socially-charged contexts. Additionally, to ensure TESOL teachers are fully prepared for their careers, the article provides several strategies for integrating the concept of perezhivanie into TESOL teacher education programmes and activities supporting continuing professional development (CPD). Although its primary focus is on TESOL teachers, the article also serves as a valuable resource for teachers, teacher educators, and CPD providers across languages, including non-language-specific disciplines.