Attention is not the same thing as concentration. Concentration is exclusion; attention, which is total awareness, excludes nothing. It seems to me that most of us are not aware, not only of what we are talking about but of our environment, the colours around us, the people, the shape of the trees, the clouds, the movement of water. Perhaps it is because we are so concerned with ourselves, with our own petty little problems, our own ideas, our own pleasures, pursuits and ambitions that we are not objectively aware.
