Difference between Theravada's self and Mahayana's intrinsic essence With reference to this comment:


  An intrinsic nature, essence or characteristic that is unique to some
  phenomena that can be described as that phenomena's self. The self of
  chair would be that intrinsic nature, essence or unique characteristic
  or set of characteristics that imbue chairness on a chair. Western
  philosophers might describe it as a platonic ideal.


In Theravada Buddhism, "sabbe dhamma anatta", means all phenomena is not self. This can also be rephrased as there is no self in all phenomena, with the understanding of "self" as a permanent and eternal core or soul or self at the center of beings and also non-beings. A chair, a tree, a cat, the mind, empty space and Nibbana all do not have a self, according to Theravada. All things except Nibbana, are subject to change, arising and passing - these are known as "sankhara", or conditioned and/or compounded things. The term "dhamma" refers to phenomena, which includes Nibbana and also all sankharas. Basically everything falls under "dhamma". The emptiness of Theravada refers to the notion that all phenomena is empty of a self. "Sabbe dhamma anatta" is accepted by Mahayana Buddhism too.

Meanwhile, in Mahayana Buddhism, specifically in Madhyamaka, all phenomena is empty of intrinsic essence. Emptiness itself is also empty of intrinsic essence - sometimes called the emptiness of emptiness. intrinsic essence is called "svabhava". I can say that in Madhyamaka, there is an equivalent "sabbe dhamma asvabhava" of sorts.

Generally, the difference between the two is understood as "Mahayana says everything is not ultimately real", but on the other hand, "Theravada says everything is not-self, but are real (even if not constant and not permanent)".

The commentator above now introduced a new set of terminology saying that Theravada's self or atta refers to the "self of persons", while the Mahayana svabhava (or intrinsic essence) of a chair is a "self of chairs".

So my questions would be:


Do other Mahayana Buddhists apart from the commentator above, also call the intrinsic essence (svabhava) of a chair, as the "self of chairs"?
If Theravada states "sabbe dhamma anatta" and Mahayana states "sabbe dhamma asvabhava", does it mean that anatta = asvabhava, and therefore, atta (self) = svabhava (intrinsic essence)?
Depending on your view: if the Theravada atta (self) is different from the Mahayana svabhava (intrinsic essence), then what really is the difference? OR if the Theravada atta (self) is same as the Mahayana svabhava (intrinsic essence), then does that make the Mahayana emptiness a redundant concept?
1. Do other Mahayana Buddhists apart from the commentator above, also call the intrinsic essence (svabhava) of a chair, as the "self of chairs"?

Yes, this is a common expression in Mahayana texts on the topic.

2. If Theravada states "sabbe dhamma anatta" and Mahayana states "sabbe dhamma asvabhava", does it mean that anatta = asvabhava, and therefore, atta (self) = svabhava (intrinsic essence)?

I think Mahayana states "sabbe dhamma shunyata" - which can be explained as "sabbe dhamma asvabhavata" and "sabbe dhamma pratityasamutpida". From this it also follows that all dharmas are anicca (ephemeral) and dukkha (here, faulty/unreliable).

If we don't nitpick too much about the meaning of the equal sign, I think I can agree with your statements that "anatta = asvabhava" and "atta = svabhava". More on this in a second.

3. Depending on your view: if the Theravada atta (self) is different from the Mahayana svabhava (intrinsic essence), then what really is the difference? OR if the Theravada atta (self) is same as the Mahayana svabhava (intrinsic essence), then does that make the Mahayana emptiness a redundant concept?

I think svabhava is a broader concept than atman (atta). To me, atman is only one case of reification, or one case of attributing svabhava to abstractions and observations.

Therefore, Mahayana's emptiness is not redundant. True -- it is not something entirely new that was absent in Theravada, but in my opinion it gives proper emphasis to something that is kind of implicit and not explained enough in the Pali Canon (even if ever-present "between the lines").