Maitri means loving-kindness or unconditional friendliness. David Nichtern shows you how to do this heart-opening Buddhist practice, and Cyndi Lee explains how to incorporate it in your yoga practice. Photo by Xevi Casanovas. Our hearts are always fundamentally open. They’re just covered up sometimes by doubt, hesitation, fear, anxiety, and all kinds of self-protective habitual patterns. The practice of opening the heart is based on exploring and reversing some of these patterns. We cultivate openness while noting and dissolving the…