" The object of our mind can be a mountain, a rose, the full moon, or the person standing in front of us. We believe these things exist outside of us as separate entities, but these objects of our perceptions are us. This includes our feeling. When we hate someone, we also hate ourself. The object of our mindfulness is actually the whole cosmos. Mindfulness is mindfulness of the body, feelings, perceptions, any of the mental formations, and all of the seeds in our consciousness. The Four Establishments of Mindfulness contain everything in the cosmos. Everything in the cosmos is the object of our perception, and, as such, it does not exist only outside of us but also within us. "

― Thich Nhat Hanh , The Heart of the Buddha's Teaching: Transforming Suffering into Peace, Joy, and Liberation