Something of interest.....
Based on your other recent thread & pdf: viewtopic.php?f=44&t=16202&p=231246#p231246
A Manual of Abhidhamma: under "The Realisation of Nibbana" on Page 84 as follows:
Having thus gained a correct view of the real nature of his self, freed from the false notion of an identical substance of mind and matter, he attempts to investigate the cause of this “Ego-personality”. He realises that everything worldly, himself not excluded, is conditioned by causes past or present, and that this existence is due to past ignorance (avijjà), craving (taõhà), attachment (upàdàna), Kamma, and physical food (àhàra) of the present life.
On account of these five causes this personality has arisen and as the past activities have conditioned the present, so the present will condition the future. Meditating thus, he transcends all doubts with regard to the past, present, and future (Kankhàvitaraõavisuddhi). Thereupon he contemplates that all conditioned things are transient (Anicca), subject to suffering (Dukkha), and devoid of an immortal soul (Anattà). Wherever he turns his eyes, he sees nought but these three characteristics standing out in bold relief.
He realises that life is a mere flowing, a continuous undivided movement. Neither in a celestial plane nor on earth does he find any genuine happiness, for every form of pleasure is only a prelude to pain. What is transient is therefore subject to suffering and where change and sorrow prevail there cannot be a permanent ego.