One-pointedness is a quality of meditation in which you develop tremendous awareness. Your mind becomes very focused, very accurate. You appreciate sense perceptions, but you are not trapped by them, and they do not create samsaric, karmic problems. Because you are able to perceive, to appreciate, and to focus your mind one-pointedly, you develop a sense of composure.
From The Truth of Suffering and the Path of Liberation by Chögyam Trungpa, page 105