From The Art of Mindful Living by Thich Nhat Hanh. Audiobook links are below.
Breathing is the essence of Thich Nhat Hanh’s teachings. The technique in the photo is called “In/Out.” We stop thinking so much when we focus on our breath. We all think too much. Our body is present, but our mind is lost in the past or anxious about the future. The first fourteen minutes of The Art of Mindful Living, Part 1 is about this breath. It’s worth a listen.