Yin–yang names a dynamic complementarity: apparent opposites interdefine, interpenetrate, and transform one another (Ames & Hall, 2003). Modern psychotherapy reaches a similar stance through dialectics—holding acceptance and change together to reduce rigid, all-or-nothing reactions (Linehan, 1993, 2015). This article translates yin–yang into a practical framework for emotion regulation that integrates (a) mindful allowing of internal experience (yin) with (b) shaping behavior toward values and contingencies (yang). We review supportive evidence and offer concrete drills you can apply in daily life or clinical settings (Gross, 2015; Lindsay & Creswell, 2017).