Basic Exercise I
Try to keep your mind (but not your eyes) on the abdomen. You will thereby come to know its rising and falling movements. If these movements are not clear to you in the beginning, then place both hands on the abdomen to feel these rising and falling movements. After a short time the upward movement of exhalation will become clear. Then make a mental note of rising for the upward movement, falling for the downward movement. Your mental note of each movement must be made while it occurs.
From this exercise you learn the actual manner of the upward and downward movements of the abdomen. You are not concerned with the form of the abdomen. What you actually perceive is the bodily sensation of pressure caused by the heaving movement of the abdomen. So do not dwell on the form of the abdomen but proceed with the exercise. For the beginner it is a very effective method of developing the faculties of attention, concentration of mind and insight in contemplation. As practice progresses, the manner of the movements will be clearer. The ability to know each successive occurrence of the mental and physical processes at each of the six sense organs is acquired only when insight contemplation is fully developed. Since you are only a beginner whose attentiveness and power of concentration are still weak, you may find it difficult to keep the mind on each successive rising movement and falling movement as it occurs. In view of this difficulty, you may be inclined to think, "I just don't know how to keep my mind on each of these movements." Then simply remember that this is a learning process. The rising and falling movements of the abdomen are always present and therefore there is no need to look for them. Actually it is easy for a beginner to keep his or her mind on these two simple movements.
Continue with this exercise in full awareness of the abdomen's rising and falling movements. Never verbally repeat the words, rising, falling, and do not think of rising and falling as words. Be aware only of the actual process of the rising and falling movements of the abdomen. Avoid deep or rapid breathing for the purpose of making the abdominal movements more distinct, because this procedure causes fatigue that interferes with the practice. Just be totally aware of the movements of rising and falling as they occur in the course of normal breathing.