..續本文上一頁ver, two of its factors, initial application and sustained application, appear in time to be rather coarse, not as refined as the other factors. Then the meditator renews his practice of concentration intent on overcoming initial and sustained application. When his faculties mature, these two factors subside and he enters the second jhana. This jhana contains only three component factors: rapture, happiness, and one-pointedness. It also contains a multiplicity of other constituents, the most prominent of which is confidence of mind.

　　In the second jhana the mind becomes more tranquil and more thoroughly unified, but when mastered even this state seems gross, as it includes rapture, an exhilarating factor that inclines to excitation. So the meditator sets out again on his course of training, this time resolved on overcoming rapture. When rapture fades out, he enters the third jhana. Here there are only two absorption factors, happiness and one-pointedness, while some other auxiliary states come into ascendency, most notably mindfulness, clear comprehension, and equanimity. But still, the meditator sees, this attainment is defective in that it contains the feeling of happiness, which is gross compared to neutral feeling, feeling that is neither pleasant not painful. Thus he strives to get beyond even the sublime happiness of the third jhana. When he succeeds, he enters the fourth jhana, which is defined by two factors -- one-pointedness and neutral feeling -- and has a special purity of mindfulness due to the high level of equanimity.

　　Beyond the four jhanas lie the four immaterial states, levels of absorption in which the mind transcends even the subtlest perception of visualized images still sometimes persisting in the jhanas. The immaterial states are attained, not by refining mental factors as are the jhanas, but by refining objects, by replacing a relatively gross object with a subtler one. The four attainments are named after their respective objects: the base of infinite space, the base of infinite consciousness, the base of nothingness, and the base of neither-perception-nor-non-perception.[65] These states represent levels of concentration so subtle and remote as to elude clear verbal explanation. The last of the four stands at the apex of mental concentration; it is the absolute, maximum degree of unification possible for consciousness. But even so, these absorptions reached by the path of serenity meditation, as exalted as they are, still lack the wisdom of insight, and so are not yet sufficient for gaining deliverance.

　　The kinds of concentration discussed so far arise by fixing the mind upon a single object to the exclusion of other objects. But apart from these there is another kind of concentration which does not depend upon restricting the range of awareness. This is called "momentary concentration" (khanika-samadhi). To develop momentary concentration the meditator does not deliberately attempt to exclude the multiplicity of phenomena from his field of attention. Instead, he simply directs mindfulness to the changing states of mind and body, noting any phenomenon that presents itself; the task is to maintain a continuous awareness of whatever enters the range of perception, clinging to nothing. As he goes on with his noting, concentration becomes stronger moment after moment until it becomes established one-pointedly on the constantly changing stream of events. Despite the change in the object, the mental unification remains steady, and in time acquires a force capable of suppressing the hindrances to a degree equal to that of access concentration. This fluid, mobile concentration is developed by the practice of the four foundations of mindfulness, taken up along the path of insight; when sufficiently strong it i…

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