When the practitioner studies with a teacher of jhana, then inevitably the practice leans towards tranquillity.
A balanced practice is recommended:
‘When I exert a [physical, verbal, or mental] fabrication against this cause of stress, then from the fabrication of exertion there is dispassion. When I look on with equanimity at that cause of stress, then from the development of equanimity there is dispassion.’ So he exerts a fabrication against the cause of stress where there comes dispassion from the fabrication of exertion, and develops equanimity with regard to the cause of stress where there comes dispassion from the development of equanimity. Thus the stress coming from the cause of stress for which there is dispassion through the fabrication of exertion is exhausted & the stress resulting from the cause of stress for which there is dispassion through the development of equanimity is exhausted."—MN 101
“Now, monks, on any occasion when the mind is sluggish, that is the wrong time to develop calm as a factor for awakening, concentration as a factor for awakening, equanimity as a factor for awakening. Why is that? The sluggish mind is hard to raise up by those mental qualities. Just as if a man, wanting to make a small fire blaze up, were to place wet grass in it, wet cow dung, & wet sticks; were to give it a spray of water and smother it with dust. Is it possible that he would make the small fire blaze up?”
“No, lord.”
[…]
“Now, on any occasion when the mind is restless, that is the wrong time to develop analysis of qualities as a factor for awakening, persistence as a factor for awakening, rapture as a factor for awakening. Why is that? The restless mind is hard to still with those mental qualities. Just as if a man, wanting to put out a large fire, were to place dry grass in it, dry cow dung, & dry sticks; were to blow on it with his mouth and not smother it with dust. Is it possible that he would put it out?”
“No, lord.”—SN 46.53
Mindfulness is the governing factor and can be applied to both the active and passive factors.
Here the Buddha relates the tranquillity factors to the element water, and the investigation and right effort factors to fire. Excessive reliance on tranquillity suppresses the right effort arm of the path. Tranquillity and insight are the two themes intertwined in the noble eightfold path, and they are separated and elementally related in the seven factors of awakening.
The difference between learner and adept depends upon the degree of awareness of the balance of these active and passive factors. The learner understands the dynamics of the respective groups conceptually, but cannot yet always achieve balance in mental states:
"Furthermore, the monk who is a learner discerns the five faculties: the faculty of conviction… persistence… mindfulness… concentration… discernment. He sees clear through with discernment their destiny, excellence, rewards, & consummation, but he does not touch them with his body. This too is a manner of reckoning whereby a monk who is a learner, standing at the level of a learner, can discern that ‘I am a learner.’
"And what is the manner of reckoning whereby a monk who is an adept, standing at the level of an adept, can discern that ‘I am an adept’? There is the case where a monk who is an adept discerns the five faculties: the faculty of conviction… persistence… mindfulness… concentration… discernment. He touches with his body and sees clear through with discernment what their destiny, excellence, rewards, & consummation are. This is a manner of reckoning whereby a monk who is an adept, standing at the level of an adept, can discern that ‘I am an adept.’—SN 48.53
Cluster based on meaning: MN 101> SN 46.53> SN 48.53