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## Experiment: A Contemplation
Experiment is the sixteenth term of contemplation. The activity of the soul through mind, speech, and body is called yoga, and the same yoga is described in this term by the word "experiment." This is called soul activity because the three cannot act without the influence of the soul. Acharya Akalankdev has explained it by stating the external and internal causes of all three yogas. In short, it is as follows:
The soul's प्रदेशपरिस्पन्दन (interaction with the field) towards contemplation due to external and internal causes is called मनोयोग (mind yoga). The support of मनोवर्गणा (mind-forming matter) is the external cause. The destruction and cessation of वीर्यान्तरायकर्म (hindering karma) and the destruction and cessation of नोइन्द्रियावरणकर्म (obscuring karma of the senses) are its internal causes.
The soul's प्रदेशपरिस्पन्दन towards speech due to external and internal causes is called वचनयोग (speech yoga). The support of वचनवर्गणा (speech-forming matter) is the external cause, and the destruction and cessation of वीर्यान्तरायकर्म and the destruction and cessation of मतिज्ञानावरण (obscuring karma of knowledge) and अक्षरश्रुतज्ञानावरण (obscuring karma of scriptural knowledge) etc. are its internal causes.
The soul's प्रदेशपरिस्पन्दन towards movement and other objects due to external and internal causes is called काययोग (body yoga). The support of any kind of शरीरवर्गणा (body-forming matter) is its external cause. The destruction and cessation of वीर्यान्तरायकर्म is its internal cause.
Here, it should be remembered that in the thirteenth and fourteenth गुणस्थान (stages of spiritual progress), the destruction of वीर्यान्तरायकर्म, which is the internal cause, is the same in both गुणस्थान, but the external cause, which is the support of वर्गणा, is not the same. Therefore, in the thirteenth गुणस्थान, there is योगविधि (method of yoga), but not in the fourteenth.
A question arises here: In मनोयोग and वचनयोग, there is always some kind of support of काययोग. Therefore, it is sufficient to accept only one काययोग. In response, it is said that in मनोयोग and वचनयोग, काययोग is dominant. When काययोग helps in contemplation, it is मनोयोग, and when काययोग helps in speaking, it is called वचनयोग. From a practical point of view, these are the three types of काययोग.
Those पुद्गल (particles of matter) that are fit to become mind, which are called मनोवर्गणा पुद्गल, when they transform into mind, they are called द्रव्य-मन (material mind). According to the Shvetambar tradition, द्रव्यमन does not have a specific location in the body; it is spread throughout the body. According to the Digambar tradition, the location of द्रव्यमन is the heart, and its shape is like a lotus.
When भाषावर्गणा पुद्गल (speech-forming matter) transform into speech, they are called वचन (speech). The yoga that arises from the पुद्गल of औदारिक (generous) and बैंक्रिय (banker) etc. शरीरवर्गणा (body-forming matter) is...
Thus, there are three types of yoga due to the difference in support. From a Jain perspective, mind, speech, and body are all made of पुद्गल, and the natural movement of पुद्गल can occur even without the soul. But when पुद्गल transforms into mind, speech, and body, the specific type of activity that occurs with the help of the soul is impossible in the untransformed state. The transformation of पुद्गल into mind etc. is also dependent on the karma of the soul. Therefore, its activity is called soul activity.
Fifteen types of use of mind, speech, and body have been described, which are as follows:
1. तत्त्वार्थसूत्र राजबार्तिक 6/1/10
2. दर्शन और चिंतन (Hindi) page 309-311 - Pandit Sukhlalji