The following notes on the 24 paccaya compiled by Thomas Bruhn are very useful for understanding each of the 24 conditions.
The Paṭṭhāna (Burmese: ပဌာန ်း, pa htan:).
It is part of the Pāli Canon in the Abhidhamma Piṭaka of Theravāda Buddhism.
This book is a detailed examination of causal conditioning, the law of cause and effect, analysing 24 types of conditional relations (paccaya).
All the Paṭṭhāna is concerned with either the relation of nāma causing the arising of rūpa, rūpa causing the arising of nāma, nāma causing the arising of nāma or rūpa causing the arising of rūpa. Sometimes of nāma and rūpa causing the arising of nāma and rūpa. (nama = mental factors, rupa = physical factors).
I used the following sources and I am deeply thankful to these authors:
Sayagyi U Tint Yee: taped and later on CD converted discourses held in Yangon, around 1980.
Mahāthera Ledi Sayadaws words in the Patthanuddesa Dīpanī, translated by Sayadaw U Nyana, Yangon, 2004.
Bhadantācariya Buddhaghosa, The Visuddhimagga, translated by Ñāṇamoli Bhikkhu; BPS, Sri Lanka 1979.
Paṭṭhāna Bedingungszusammenhänge Paccayaniddesa & Kusalattika-Pañhāvāra aus dem 1. Paṭṭhāna-Buch des Abhidhamma-Piṭaka aus dem Pāḷi übersetzt und kommentiert von Agganyani, Bruckmühl, 2005.
Paṭṭhāna 1. Hetu paccayo: root condition.
“Hetu (the wholesome and unwholesome roots: lobha, dosa, moha, and alobha, adosa, amoha) hetusampayuttakānaṃ dhammānaṃ (related to its consciousness and mental factors) taṃsamuṭṭhānānañca rūpānaṃ (and its material factors) hetu paccayena paccayo (are a root condition).”
The three unskilful roots are lobha (greed), dosa (aversion), and moha (delusion); the skilful roots are their opposites (alobha, adosa, amoha).
Simply speaking: lobha, dosa, moha are the roots for the bad states of consciousness as well as the material factors that correspond. Alobha, adosa, amoha are the roots for the good states of consciousness as well as the material factors that correspond. For example, in the moment when we go with the intention to meditate, there is no craving, no anger and no ignorance factor (because we are fully aware what we are doing). So, this is alobha, adosa and amoha with the corresponding consciousness and mental factors, as well as its material factors.
Mahāthera Ledi Sayadaw’s words in the Patthanuddesa Dīpanī: “What is the hetu-relation? It is greed (lobha), hate (dosa), dullness (moha), and their respective opposites, disinterestedness (alobha), amity (adosa), intelligence (amoha). All are hetu-relations. What are the things that are related by these hetu-relations? Those classes of mind and of mental qualities that are in coexistence along with greed, hate, dullness, disinterestedness, amity, and intelligence, as well as the groups of material qualities which co-exist with the same, are the things that are so related. All these … arise or come into existence by virtue of the hetu-relation.”…
Thank you to Thomas Bruhn for sharing these notes.
About the Patthana, the 7th book of the Abhidhamma:
Patthana (Conditional Relations) deals with the 22 Triplets and 100 Couplets of the Dhammasaṅgaṇī, i.e. all the ultimate realities, both singly and in combinations, with reference to the 24 conditions to show how the causes and their effects are related.
In the methods of the Four Noble Truths and Dependent Origination, only the manifested causes and effects are considered. But in Patthana, the forces that bring about the relations between the causes and effects are also taken into account and it is with these forces that this subject is primarily concerned. Hence statements such as “Visible object-base is related to eye-consciousness element and its associated states by object condition ” are met with in the Text. This means that visible object-base, a state as the condition, is related to eye-consciousness element and its associated states, the states as the conditioned, by the force of object condition or the conditioning force of object. Although the states, as causes and effects, have to be unavoidably mentioned, stress is laid on the underlying forces that bring about the relations between them.
https://archive.org/details/conditional-relations-part-1/page/n7/mode/2up
Renaldo