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This is an early post; revised May 10, 2018; March 13, 2021; May 10, 2021; May 13, 2021; re-written May 21, 2021; revised August 18, 2021; September 7, 2026
Akusala-mūla upapatti Paṭicca Samuppāda describes how our present actions dictate the rebirth process among the 31 realms. [upapatti : [f.] birth; rebirth; approach.]
Six Root Causes That Determine Future Births
1. One is born in this world due to the six root causes.
▪One is born in the apāyā or dugati (and also subjected to suffering even when born in good realms) due to bad gati arising mainly due to lobha, dosa, and moha.
▪One is born in the remaining “good realms” or sugati (and experiences mundane sensory pleasures) if they cultivate good gati via the mundane versions of alobha, adosa, and amoha.
▪The two main versions of Paṭicca Samuppāda (PS) operate when actions, speech, and thoughts occur with these three root causes; see #2.
▪Also, see “Six Root Causes – Loka Samudaya (Arising of Suffering) and Loka Nirodhaya (Nibbāna).”
Two Types of PS Processes Based on Lobha, Dosa, Moha
2. Paṭicca Samuppāda describes the PS process when one acts with lobha, dosa, moha, the three root causes that bring “bad outcomes.” It is two-fold:
▪The Idappaccayatā PS describes the moment-to-moment progression of a “lifestream” or a being. This is discussed in “Idappaccayatā Paṭicca Samuppāda – Bhava and Jāti Within a Lifetime.”
▪The upapatti PS describes how a “lifestream” or a being makes the saṁsāric journey via repeated births in the 31 realms.
▪It is important to note that Buddhaghosa (in the Visuddhimagga) described only the upapatti PS. In recent times, Waharaka Thero has discussed the Idappaccayatā PS in detail.
Upapatti Paṭicca Samuppāda Process
3. Let us now discuss the upapatti PS, which describes how the PS cycle goes through a new birth at the end of the current life. The steps in this cycle are:
“avijjā paccayā saṅkhāra; saṅkhāra paccayā viññāṇa; viññāṇa paccayā nāmarūpa, nāmarūpa paccayā saḷāyatana, saḷāyatana paccayā phasso, phassa paccayā vedanā, vedanā paccayā taṇhā, taṇhā paccayā upādāna, upādāna paccayā bhavo, bhava paccayā jāti, jāti paccayā jarā, maraṇa, soka-parideva-dukkha-domanassupāyāsā sambhavan’ti” [Weblink: suttacentral: Majjhima Nikāya 115 Bahudhātukasutta]
And that is how this whole mass of suffering arises: “Evametassa kevalassa dukkhakkhandhassa samudayo hoti”
Let us briefly discuss those steps.
Saṅkhāra – Thoughts, Speech, Actions Due to Avijjā
4. With ignorance of the Four Noble Truths as a condition, one thinks, speaks, and acts with those “bad root causes” of lobha, dosa, moha. Such thoughts, speech, and actions arise due to mano, vacī, and kāya saṅkhāra. We must note that these are abhisaṅkhāra, i.e., they are strong saṅkhāra; “abhi” means “strong.” See, “Saṅkhāra – What It Really Means.”
▪We are born without anything other than a tiny baby body, which started as a single cell in the mother’s womb. We grow up and start acquiring “stuff,” both material and non-material: knowledge, material things, friends, spouse, children, fame, etc.
▪While we acquire these “things” we also acquire new habits (gati) or strengthen ones that we brought from previous lives; these take place according to the Idappaccayatā PS at every moment: “pati + ichcha sama uppāda,” i.e., we do things that we like and get similar kind of results.
▪When we die, we take with us only the kamma seeds (good and bad) from our actions. One of the existing kamma seeds (from this life or previous lives) gives rise to the next life, where we acquire more based on the gati and āsavas. So the cycle perpetuates.
Viññāṇa in Upapatti PS Is Paṭisandhi Viññāṇa
5. With saṅkhāra as a condition, energy for new bhava or a paṭisandhi viññāṇa arises.
▪This viññāṇa of the new life arises according to the nature of the kamma seed that gave rise to it. If that kamma seed was due to some hateful act(s), then the viññāṇa will be matching: “pati + ichcha sama uppāda.” If it is a seed due to an act of generosity done with loving kindness, it could be the viññāṇa of a Brahma.
▪Thus the “base level of viññāṇa” for animal life is VERY DIFFERENT from that of human life, even for the same “lifestream,” i.e., when a human is reborn as an animal the “base level of viññāṇa” makes a huge downward transition. This is why it is NOT correct to say that “viññāṇa is transferred from life to life.” See, “What Reincarnates? – Concept of a Lifestream.”
What Are Nāmarūpa?
6. With viññāṇa as condition, nāmarūpa arise.
▪For clarification of nāmarūpa, see “Viññāṇa Paccayā Nāmarūpa.“
▪A deeper discussion at “Kamma Viññāṇa and Nāmarūpa Paricceda Ñāṇa.”
Saḷāyatana Means To Use the Sensory Faculties With a “Unpurified Mind”
7. With nāmarūpa as a condition, saḷāyatana arises.
▪In upapatti PS, salāyatana (six sense doors) refers to those that arise for the new existence. For example, six sense doors arise for an animal while just three (eye, ear, and mind) arise for Brahma.
▪See, “Nāmarūpa Paccayā Saḷāyatana” for details.
Phassa, in This Case, Is “Defiled Contact” or Samphassa
8. With saḷāyatana as a condition, phasso arises.
▪The meaning of the root word “phassa” is “contact.” Any living creature sees with eyes, hears with ears, etc.
▪However, in PS, phassa is “samphassa” or “saŋ phassa.” See #9.
▪This is why this Akusala-mūla Paṭicca Samuppāda is not applicable for an Arahant (and also for other Ariyā too at most times). An Arahant does not generate “samphassa” but just “phassa” without “saŋ.”
▪Many posts on the website on this critical concept; see, “Search Results for samphassa.”
Vedanā Is Samphassa-Jā-Vedanā
9. With (saŋ) phassa as a condition, vedanā arises.
▪The root level of vedanā arises due to phassa for living beings, including Arahants.
▪It is important to realize that NOT all vedanā play a role in Akusala-Mūla PS. Only those vedanā that arise due to samphassa (“samphassa jā vedanā”) play a role here.
▪When greed, anger, or ignorance take over, a mind generates samphassa-jā-vedanā.
▪Such “samphassa jā vedanā” depends on the gati and āsavas: see “Vedanā (Feelings) Arise in Two Ways.” Also, see step #3 in “Taṇhā – How We Attach Via Greed, Hate, and Ignorance.”
▪We discussed this recently in the post, “Dukkha Samudaya Starts With Samphassa-Jā-Vedanā.”
“Attaching” or Taṇhā
10. With samphassa-jā-vedanā as a condition, taṇhā arise.
▪Taṇhā arise when one gets “attached,” or ‘fused” into a thing or situation: with sukha vedanā, one attaches with greed; with displeasure, one attaches with hate; one also attaches with not knowing what to do (with a highly agitated mind); see, “Taṇhā – How We Attach Via Greed, Hate, and Ignorance.”
The Key Step of Upādāna
11. With taṇhā as condition, upādāna arise.
▪At the moment of death, in the last citta vīthi, the dying person gets a kamma nimitta. This is usually a vision or a sound that depicts the nature of the strong kamma seed that came to the forefront of the mind.
▪For example, if the kamma seed that is about to give the next birth is due to killing, then the person may see a gun or hear the sound of it, or even see himself as getting ready to shoot; thus, the person will have the same hateful thoughts arise and just like at the time of the crime, the person embraces that situation automatically (upādāna) because one has such “gati” or habits.
▪I highly recommend the subsection on “Concepts of Upādāna and Upādānakkhandha,” which will also clarify the previous steps.
Kammic Energy Accumulation in the Step “Upādāna Paccayā Bhavo”
12. With upādāna as condition, a new existence (bhava) is grasped at the cuti-paṭisandhi moment.
▪The next citta vīthi starts with the new existence or “bhava,” matching that state of mind: “pati + ichcha sama uppāda.” Depending on the kamma nimitta that was grasped, a matching existence, a human, animal, deva, etc. arise; see, “Paṭicca Samuppāda – “Pati+ichcha”+”Sama+uppāda.”
▪More details in “Concepts of Upādāna and Upādānakkhandha.” A deeper analysis of “Difference Between Taṇhā and Upādāna.”
Bhava Paccayā Jāti – Kammic Energy Giving Rise to Rebirth in a New Realm
13. With bhava as a condition, jāti (new birth) arises. Except for the human and animal realms, bhava and jāti are the same. See, “Bhava and Jāti – States of Existence and Births Therein.”
▪A birth matching the bhava starts at this step for the human and animal realms. The selected “human/animal bhava” lasts until the kammic energy associated with that kamma seed is exhausted, as explained in the post above.
▪Thus, if the kamma seed has the potential for thousands of years of life, the next birth will still be in the human realm when the current life ends.
14. With jāti as condition, “jarā, maraṇa, soka-parideva-dukkha-domanassupayasa sambhavan’ti”.
▪Jāti inevitably results in decay and eventual death. Therefore, this process describes how dukkha arises in the cycle of rebirth.
▪No matter where one is born in the 31 realms, one grows old and eventually dies. During that time, one goes through all kinds of suffering, particularly in the human realm and below. Aging and death are certainties.
▪And at death, the whole cycle re-starts unless the Arahanthood has been realized. One WILL BE born somewhere in the 31 realms, and the whole process will continue.
15. The above steps describe the upapatti PS. The other aspect, i.e., what happens during a given lifetime, is described in “Idappaccayatā Paṭicca Samuppāda – Bhava and Jāti Within a Lifetime.”
▪Of course, ALL kamma accumulation happens in the Idappaccayatā PS. The upapatti PS explains how rebirths occur according to such accumulated kammic energies.
▪All the steps in the Paṭicca Samuppāda are described in detail in the series: “Paṭicca Samuppāda in Plain English.”
▪Also, see the new subsection, “Paṭicca Samuppāda – Essential Concepts.”