http://plato.stanford.edu/entries/buddha/
Core Teachings
The Buddha's basic teachings are usually summarized using the device of the Four Noble Truths:
There is suffering.
There is the origination of suffering.
There is the cessation of suffering.
There is a path to the cessation of suffering.
The first of these claims might seem obvious, even when ‘suffering’ is understood to mean not mere pain but existential suffering, the sort of frustration, alienation and despair that arise out of our experience of transitoriness. But there are said to be different levels of appreciation of this truth, some quite subtle and difficult to attain; the highest of these is said to involve the realization that everything is of the nature of suffering. Perhaps it is sufficient for present purposes to point out that while this is not the implausible claim that all of life's states and events are necessarily experienced as unsatisfactory, still the realization that all (oneself included) is impermanent can undermine a precondition for real enjoyment of the events in a life: that such events are meaningful by virtue of their having a place in an open-ended narrative.
It is with the development and elaboration of (2) that substantive philosophical controversy begins. (2) is the simple claim that there are causes and conditions for the arising of suffering. (3) then makes the obvious point that if the origination of suffering depends on causes, future suffering can be prevented by bringing about the cessation of those causes. (4) specifies a set of techniques that are said to be effective in such cessation. Much then hangs on the correct identification of the causes of suffering. The answer is traditionally spelled out in a list consisting of twelve links in a causal chain that begins with ignorance and ends with suffering (represented by the states of old age, disease and death). Modern scholarship has established that this list is a later compilation. For the texts that claim to convey the Buddha's own teachings give two slightly different formulations of this list, and shorter formulations containing only some of the twelve items are also found in the texts. But it seems safe to say that the Buddha taught an analysis of the origins of suffering roughly along the following lines: given the existence of a fully functioning assemblage of psychophysical elements (the parts that make up a sentient being), ignorance concerning the three characteristics of sentient existence—suffering, impermanence and non-self—will lead, in the course of normal interactions with the environment, to appropriation (the identification of certain elements as ‘I’ and ‘mine’). This leads in turn to the formation of attachments, in the form of desire and aversion, and the strengthening of ignorance concerning the true nature of sentient existence. These ensure future rebirth, and thus future instances of old age, disease and death, in a potentially unending cycle.
The key to escape from this cycle is said to lie in realization of the truth about sentient existence—that it is characterized by suffering, impermanence and non-self. But this realization is not easily achieved, since acts of appropriation have already made desire, aversion and ignorance deeply entrenched habits of mind. Thus the measures specified in (4) include various forms of training designed to replace such habits with others that are more conducive to seeing things as they are. Training in meditation is also prescribed, as a way of enhancing one's observational abilities, especially with respect to one's own psychological states. Insight is cultivated through the use of these newly developed observational powers, as informed by knowledge acquired through the exercise of philosophical rationality. There is a debate in the later tradition as to whether final release can be attained through theoretical insight alone, through meditation alone, or only by using both techniques. Ch'an, for instance, is based on the premise that enlightenment can be attained through meditation alone, whereas Theravāda advocates using both but also holds that analysis alone may be sufficient for some. (This disagreement begins with a dispute over how to interpret D I.77–84.) The third option seems the most plausible, but the first is certainly of some interest given its suggestion that one can attain the ideal state for humans just by doing philosophy.
The Buddha seems to have held (2) to constitute the core of his discovery. He calls his teachings a ‘middle path’ between two extreme views, and it is this claim concerning the causal origins of suffering that he identifies as the key to avoiding those extremes. The extremes are eternalism, the view that persons are eternal, and annihilationism, the view that persons go utterly out of existence (usually understood to mean at death, though a term still shorter than one lifetime is not ruled out). It will be apparent that eternalism requires the existence of the sort of self that the Buddha denies. What is not immediately evident is why the denial of such a self is not tantamount to the claim that the person is annihilated at death (or even sooner, depending on just how impermanent one takes the psychophysical elements to be). The solution to this puzzle lies in the fact that eternalism and annihilationism both share the presupposition that there is an ‘I’ whose existence might either extend beyond death or terminate at death. The idea of the ‘middle path’ is that all of life's continuities can be explained in terms of facts about a causal series of psychophysical elements. There being nothing more than a succession of these impermanent, impersonal events and states, the question of the ultimate fate of this ‘I’, the supposed owner of these elements, simply does not arise.
This reductionist view of sentient beings was later articulated in terms of the distinction between two kinds of truth, conventional and ultimate. Each kind of truth has its own domain of objects, the things that are only conventionally real and the things that are ultimately real respectively. Conventionally real entities are those things that are accepted as real by common sense, but that turn out on further analysis to be wholes compounded out of simpler entities and thus not strictly speaking real at all. The stock example of a conventionally real entity is the chariot, which we take to be real only because it is more convenient, given our interests and cognitive limitations, to have a single name for the parts when assembled in the right way. Since our belief that there are chariots is thus due to our having a certain useful concept, the chariot is said to be a mere conceptual fiction. (This does not, however, mean that all conceptualization is falsification; only concepts that allow of reductive analysis lead to this artificial inflation of our ontology, and thus to a kind of error.) Ultimately real entities are those ultimate parts into which conceptual fictions are analyzable. An ultimately true statement is one that correctly describes how certain ultimately real entities are arranged. A conventionally true statement is one that, given how the ultimately real entities are arranged, would correctly describe certain conceptual fictions if they also existed. The ultimate truth concerning the relevant ultimately real entities helps explain why it should turn out to be useful to accept conventionally true statements (such as ‘King Milinda rode in a chariot’) when the objects described in those statements are mere fictions.
Using this distinction between the two truths, the key insight of the ‘middle path’ may be expressed as follows. The ultimate truth about sentient beings is just that there is a causal series of impermanent, impersonal psychophysical elements. Since these are all impermanent, and lack other properties that would be required of an essence of the person, none of them is a self. But given the right arrangement of such entities in a causal series, it is useful to think of them as making up one thing, a person. It is thus conventionally true that there are persons, things that endure for a lifetime and possibly (if there is rebirth) longer. This is conventionally true because generally speaking there is more overall happiness and less overall pain and suffering when one part of such a series identifies with other parts of the same series. For instance, when the present set of psychophysical elements identifies with future elements, it is less likely to engage in behavior (such as smoking) that results in present pleasure but far greater future pain. The utility of this convention is, however, limited. Past a certain point—namely the point at which we take it too seriously, as more than just a useful fiction—it results in existential suffering. The cessation of suffering is attained by extirpating all sense of an ‘I’ that serves as agent and owner.
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see my previous reply.
