Jhanacittas - Different stages of rupa-jhana
As we have seen in the preceding chapter, the person who wants to cultivate samatha so as to be able to attain jhāna, has to develop the five jhāna- factors, which can inhibit the hindrances, namely: applied thinking (vitakka), sustained thinking (vicāra), rapture (pīti), happy feeling (sukha), concentration (samādhi).
Jhāna is developed in stages, with each succeeding stage being more refined
than the preceding one. There are five stages of rūpa-jhāna in all. For the
first stage of rūpa-jhāna it is still necessary that all five jhāna-factors arise
with the jhānacitta, but at each higher stage, when one has become more
advanced, jhāna-factors are successively abandoned. When one attains to the
rūpa-jhāna of the second stage, one does not need the jhāna-factor which is
'applied thinking' (vitakka). At this point the jhānacitta can experience the
meditation subject without vitakka (which has the characteristic of directing
the mind unto an object and the function of 'touching' the object). The other
jhāna-factors still arise with the jhānacitta of the second stage.
At the third stage of jhāna 'sustained thinking' (vicāra) is abandoned. At this
stage one does not need vitakka or vicāra any longer in order to become
absorbed in the meditation subject. Now there are three factors remaining:
rapture (pīti), happy feeling (sukha) and concentration (samādhi). At the
fourth stage rapture (pīti) is abandoned. There is still happy feeling
accompanying the jhāna-citta, but piti does not arise. Without pīti, the
jhānacitta is more quiet, more refined. At the fifth stage happy feeling
(sukha) too is abandoned and there is neutral feeling (upekkhā vedanā)
accompanying the jhānacitta instead of happy feeling. At this stage one is no
longer attached to happy feeling. The jhāna-factor which is concentration
(samādhi) remains.
Some people can, at the second stage of jhāna, abandon both 'applied
thinking' and 'sustained thinking' (vitakka and vicāra). Consequently, they
can, in the third stage, abandon rapture (pīti) and in the fourth stage happy
feeling (sukha). Thus for them there are only four stages of jhāna instead
of five. That is the reason why rūpa-jhānas can be counted as four stages or
as five stages (the fourfold system or the fivefold system). When we
read in the suttas about four stages of jhāna, the fourfold system is referred
to.