There is a whole dimension of life to which we have to listen with our whole heart, mind-fully, as we say. Mindfulness is necessary to find meaning—and the intellect is not the full mind. The intellect, one has to hasten to say, is an extremely important part of our mind, but it isn’t the whole mind. What I mean here when I say “mind” is more what the Bible calls the “heart,” what many religious traditions call the “heart.” The heart is the whole person, not just the seat of our emotions. The kind of heart that we are talking about here is the lover’s heart, which says, “I will give you my heart.” That doesn’t mean I give you part of myself; it means I give myself to you. So when we speak about wholeheartedness, a wholehearted approach to life, mindfulness, that alone is the attitude through which we give ourselves to meaning.
—from the book The Way of Silence: Engaging the Sacred in Daily Life by Brother David Steindl-Rast