What do you mean by spiritualism?
I agree some forms of yoga have religious and so called 'spiritualism ' part . But most of the popular yoga is just a collection of different exercises .
As you point out, my use of "spiritualism" was inaccurate. I meant to say "spirituality" or some form of that word. That was an error.
As you no doubt know, there are many forms of yoga. There's Hatha yoga, which is the type most Westerns would think of when they think of yoga, the stretches and asanas and such. There's pranayama which is breath yoga, that is a discipline related to the use of the breath. Kundalini deals with the movement of spiritual energy ("chi" if you like) within the body. Viniyoga, while it focuses on physical work, includes a psychological component. Other types of yoga are expressly spiritual devotions.
These different types of yoga are not exclusive to each other; the Kundalini practitioner also incorporates asanas and pranayamic breathing exercises within kundalini practice. It is this holistic approach that seems to be at issue.
The contemporary Western mindset likes to put things in boxes with boundaries. There's the "work" part of life and the "home" part of life and when the businessman performs work tasks in the domicile he is said to "bring work home with him." That is the work portion of his life has invaded the home portion of a life. The businessman generally sees the work and home parts of his life as being separate and distinct despite the occasional overlap.
Then there's the experience of the Trappist monk. The monk makes jam and performs religious devotionals. To the monk, these are not separate; making the jam is a devotional act in and of itself. Both are aspects of the monk's life, a life he as turned to devotion of God.
Contrasting the experience of the businessman with that of the monk we can see that the former has compartmentalized parts of his life into distinct portions that overlap with each other whereas the latter sees his life, in all its facets, as a holistic act of devotion. Expressed visually, the difference is akin to the difference between van Gogh and Lichtenstein's
Bedroom at Arles.
Van Gogh's
Lichtenstein's
The sharp color contrasts and dark lines of Lichtenstein's work seems to compartmentalize each artifact in the room, thereby making each item a thing in itself. Whereas the more muted lines and color contrasts of van Gogh soften distinctions between individual pieces of the room and draw the eye to the whole, rather than the particular. Lichtenstein's piece represents the businessman and van Gogh's the monk.
The businessman's view of the world is representative of how Westerners generally view the world, full of parts separate and distinct. The monk's idea of the self as a holistic agent is representative of the traditional Oriental means of thought.
"But wait," you say, "I thought we were talking about yoga." Yes, well the difference between the Western and the Oriental point of view brings this right back to yoga. The Western may say, utilizing a compartmental point of view, that there are different types of yoga. In contrast, the traditional Oriental point of view would be that there are different aspects of yoga that can be discussed separately, but cannot be totally divided from the whole anymore than the rye and pumpernickel portions of a loaf of marble rye can be separated from themselves while retaining the identity of the loaf as a whole.
Now, we can have these different ways of considering yoga, compartmentalized or holistic. I contend that it is superior to consider yoga in the light of a holistic worldview (Oriental) principally because the vocabulary and mindset is better suited to the broad discipline of yoga. The compartmentalized worldview can describe yoga, but it cannot do it as well as the holistic worldview. This is akin to describing to another how to perform medical procedures using the vocabulary of a mechanic, rather than a doctor. You could probably describe how to perform simply procedures, like resetting a bone or stitching a laceration, but you simply cannot describe how to perform complex procedures, like neurosurgery; the vocabulary simply breaks down. The same is true of yoga; the compartmentalized worldview of the west can perform a yeoman's job of describing of yoga but it eventually breaks down and cannot describe as fully yoga as the holistic view can.
We must consider yoga as a vast discipline that encompasses spiritual and religious practices as well as purely physical exercises. Accepting the use of the holistic worldview to describe yoga, we cannot fully separate those elements from any other. As such, we must accept that yoga is a spiritual, as well as a physical, and a religious, and a psychological, discipline.