Bringing 'Atta' concept to Buddha's teachings

Self conception leads to, pleasant sensation if it enhances the ego, unpleasant if it dents our ego, and neutral if otherwise, which in turn leads to craving which keep the wheel of Dependent Arising turning. To abandon craving and aversion you have be equanimous to pleasant and unpleasant sensations and note impermanence of the neutral sensations.

More details are found here.

It is possible to bend the Buddha's message (if you so wish to do) because the Buddha never denied Atta in an Essential sense, he only pointed out that within empirical experience (all the way up to the perception of cessation) no 'thing' can be said to be constant and unchanging, as a self would be required to be.. hence the Mulapariyaya Sutta.

Whilst the Buddha was very clear with regards to the lack of evidence for Atta within the empirical world, the Brahmajala and Potthapada Suttas shows that with regards to the Transcendental Atta (which is the Atta that most darshanas went for - Brahman/Atta is usually seen as beyond experience, commonly stated as 'neti neti' - 'not this, not that'), he asked people to avoid speculation (because whatever that 'transcendental' is inferred to be, it cannot be perceived and therefore cannot be verified)

The Anatta doctorine is very subtle, a not insignificant number of schools of Buddhism have gone towards either essentialism (brahmanism) or annihalationism (nihilism) at some point. Yogachara has the nature of Parinispanna, which is a transcendental Atta. Mahayana developed the Tathagatagharba, which makes the Buddha a kind of Atta for Existence. The Buddha would have likely not concurred with these though!

“Science can give no assurance herein Buddhism can meet the atomic challenge, because the supra mundane knowledge of Buddhism begins where science leaves off. And this is clear enough to anyone who has made a study of Buddhism. For, through Buddhist meditation, the atomic constituents make up matter have been seen and felt, and the sorrow, or un-satisfactoriness (or Dukkha), of their ‘arising and passing away’ (dependent on causes) has made itself with what we call a ‘soul’ or ‘Atma’ – the illusion of Sakkayaditthi, as it is called in the Buddha’s teaching”. - Egerton C. Baptist

The illusion of Sakkayaditthi, that Egerton C. Baptist noted is the gross state of manifest of Upadanas. Sakkayaditthi as understood by a Stream Entrant is a collection of constantly changing physical and mental components [of clinging] ([upadana-]skandhas). When contemplating on the Dhamma thus, the Stream Entrant comes to realize the absence of a permanent and unchanging self (identity) or soul in any or all of the constituents of empirical existence, and beyond skandhas, there is no actual self. He she comes to the understanding that what is normally thought of as "self" is a collection of constantly changing physical and mental components [of clinging] ([upadana-]skandhas).

The illusion of ATTA, is the most Subtle state of manifest of Upadanas that ONLY at the final stage of Arahanthood would one truly come to know of and transcend this clinging to personality belief (attavad-upadana). Atta means self, ego or personality in Buddhism. But it is a mere conventional expression. It is only in Hinduism, in Vedic philosophy that we come across this doctrine of Atman. Hindus refer to three types of Atman namely, Jivatman - Micro cosmic soul; Paramatman - Macro cosmic soul; Visvatman - Cosmic soul. For them, the attainment of Salvation means comprehending these three types of souls, and salvation is nothing but unification with Brahma or the Creator God. But the Buddha said that it is nothing but a noxious concept which prevents the realization of Nibbana.

In Buddhism, the three characteristics of existence are impermanence, unsatisfactoriness and non-soul. Attachment to ego-belief is one of the four perversion (attasanna). Buddha has showed twenty kinds of ego-views with regards to the groups of existence that are called the clinging to the personality belief (sakkayaditthi). So we should understand that Attavadupadana is the most subtle form of sakkayaditthi that ONLY at the time of Nibbana that one would fully comprehend.