question I am not familiar with the term Advayavada.
answer We gave the name Advayavada Buddhism to the radical non-dual standpoint of the Madhyamaka school of Mahayana Buddhism to which we specifically adhere. A sound explanation of the term ‘advayavada’ can be found in for instance professor T.R.V. Murti’s The Central Philosophy of Buddhism: “The sole concern of the Madhyamaka advaya-vada is the purification of the faculty of knowing. The primordial error consists in the intellect being infected by the inveterate tendency to view Reality as identity or difference, permanent or momentary, one or many etc. These views falsify reality, and the dialectic [of the Madhyamaka] administers a cathartic corrective. With the purification of the intellect, Intuition emerges; the Real is known as it is, as Tathata [advayata; non-dual suchness] or bhutakoti [reality-limit; the extreme limit beyond which there is nothing which can be known]. The emphasis is on the correct attitude of our knowing..” It is in this sense that we use the term ‘advayavada’.
question What you say seems to me to be an essential teaching of the Mahayana in its complete form. The Unborn Infinite Reality can never be less than Perfect and Whole, and is the True Essence of all Beings, and is ever present. All that is needed is that, in perfect simplicity, we turn to That, and realize that the human manifestation of life is just an imperfect reflexion of That. Simple! but not easy. That is the problem. If we realize what we are, how do we remember to continue to realize it moment by moment, rather than seeking to hold on to the vision of the past?
answer Everything is, indeed, as right as it can be, and the Middle Way devoid of extremes is a perfect reflexion of it at the human level. As for your question, our answer would be that you must see that ‘vision of the past’ for what it really is: a highly selective subjective recollection in the present of things no longer there – please understand that life only happens Now.
question Existence progresses towards better or worse only in a dualistic sense. Life goes towards better, towards worse, only when one has expectations. Current failings? Simply a state of mind brought on by expectations and judgements. That ‘infinite Reality’ (what other reality is there?) will continue to ‘become’ exactly as it must? No, it is, it is exactly as it is.
answer You and the writer obviously do not experience the passage of time, i.e. the duration, the sum duration of the successive phenomena, in the same way. Your ‘reality is exactly as it is’ as opposed to his ‘reality will continue to become exactly as it, by definition, must’ makes this important point very clear. As a result of his prolonged and deep meditation on the true nature of reality, the writer has come to share fully and wholeheartedly the Buddhist view that existence is a constant flux of ever-changing events with no known beginning or necessary end. As a serious student of the Madhyamaka theories of existence, particularly of the concepts of emptiness, interdependent origination and the two truths, he has come to understand the Noble Eightfold Path as an ongoing reflexion at the level of his own life of existence as a whole becoming over time. By learning to follow the Eightfold Path successfully, he hopes to live every time more and more in tune with wondrous overall existence. For the Advayavadin, Nirvana is when we experience our own existence as being completely in harmony with existence as a whole becoming over time. In Buddhism, there is no static being, only dynamic becoming: to live is to become. And in Advayavada Buddhism, the Eightfold Path is moreover seen, not as a means to become something else in the future, but as a way to become as something rightaway in the herenow. The Eightfold Path is seen as a proven method to achieve the abandonment of all fixed views and to become oneself in the here and now as existence, as wondrous overall existence becoming over time now in its right direction. It is by becoming herenow as wondrous overall existence becoming over time now that we free ourselves from suffering and realize happiness.