The essence of One Dharma is wisdom. We practice paying attention — to our bodies, our thoughts, our emotions, to awareness itself — and through a deepening concentration and stillness of mind, we gain insight into some basic truths. Wisdom sees the impermanent, ephemeral nature of experience and the fundamental unreliability of changing phenomena. Wisdom opens our minds to selflessness, the great liberating jewel of the Buddha's enlightenment, and to the clear recognition of the Nature of Mind: intrinsically empty, naturally radiant, ceaselessly responsive. Finally, wisdom brings the understanding that nonclinging is the essential unifying experience of freedom. We see that nonclinging is both a practice to cultivate and the nature of the awakened mind itself.
— Joseph Goldstein, One Dharma