In my understanding by comparing the Arizal's works to the Tanya, the animal soul = nefesh, the G-dly soul = neshamah. But what about ruach?
2 Answers
As elaborated in the source here, that is a misunderstanding. Both souls have all levels of Nefesh, Ruach, Neshama, Chaya and Yechida.
However, in the animal soul, Nefesh (the animation of basic life functions) is more predominant, and in the G-dly soul, Neshama (the intellectual aspects of the soul) is.
The five levels might be broken down as follows:
Nefesh = Thoughts, speech, and action (machshava dibbur umaaseh) Ruach = Emotive/Character Traits (middos) Neshama = Intellectual faculties (sechel)
Chaya = The very life of the person Yechida = The person in essence
The above is based off of Chassidus in general terms.
The problem is, that oftentimes different terms are used interchangeably to mean different things. For example, in the Tanya the two souls that a Jew possesses are referred to as NEFESH Elokis and NEFESH Behemis (G-dly and animalistic soul, respectively), but this has nothing to do with the level of "nefesh" as it is found as one of five levels of the soul.
Oftentimes the term "Neshama" will refer to the Jew's soul as a whole, while other times it will be talking about the Yechida, and so on..
So when making comparisons between the Arizal and the Alter Rebbe, you have to specify exactly in which source you are making the comparison in both works, so that one can see relative to that place what is being discussed.
I am not at all well versed in the writings of the Arizal, but I can only assume that when he writes "ruach" is referring to a specifically defined term in a given work, which may have any name in the Tanya, as the author decided call it...
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This answer clarifies a lot, but if nefesh=thoughts/speech/action, ruach=middos, and neshama=sechel, then how can it be that each of nefesh, ruach, and neshama have ten faculties/sefirot (i.e. middos + sechel) source? Commented Aug 12, 2022 at 17:06
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You must be referring to the beginning of Chapter 3 of Tanya... A tiny bit hard to explain in writing, but let me do my best... What this means (that which you're referring to), is as follows: Nefesh Ruach and Neshama as I've described it, are 3 general modes of expression that the overall soul (whether Gdly or animal) has at its disposal. A person could be overall on the "intellectual" plane, or the emotional plane, or the more "action-oriented" type person. Each one of the above modes can be expressed by the soul.The 10 faculties are actual expressions, which are revealed through these– YsiegelCommented Aug 13, 2022 at 21:18