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## Chapter Eight
[299] **Nidra-nidra** is the continuous flow of **vritti** (mental activity). **Prachala** is the action that moves the soul, caused by sorrow, fatigue, intoxication, etc., and is indicated by the movement of the eyes and limbs even in a seated being. **Prachala-prachala** is the repeated occurrence of **prachala**. **Styanagridhi** is the special type of **virya** (energy) that manifests in dreams. Since the verb "**styayate**" has multiple meanings, the meaning of "dream" is taken here. **Gridhi** means "shining." The meaning of **Styanagridhi** is derived from the root "**styane**" (to be dull) and "**gaddhayati**" (to shine) in dreams. It means that the soul performs many violent actions due to the rise of **Styanagridhi**. Here, the term **darshanavaran** (veil of perception) is connected with **nidra** (sleep) and other terms through **samanaadhikarannya** (common ground). For example, **nidra-darshanavaran**, **nidra-nidra-darshanavaran**, etc.
8745. To explain the **uttaraprakriti** (subsequent nature) of the third **prakriti** (nature), it is said:
**Sadvedya** and **Asavedya** are the two **vedaniya** (objects of experience). || 8 ||
8746. **Sadvedya** is that which, upon its rise, leads to the attainment of physical and mental happiness in the paths of gods, etc. **Sadvedya** is the name for a good object of experience. **Asavedya** is that which results in various kinds of suffering. **Asavedya** is the name for a bad object of experience.
**Special Note:** Here, two types of **vedaniya** karma (karma that produces experience) are mentioned. This is **jiva-vipaki** karma (karma that ripens in the soul). The **sat** (good) and **asat** (bad) states of the soul are caused by its rise. The external material objects are called its fruits, but this is a metaphorical statement. In reality, external material objects are the cause of the rise of **sat** and **asat**. Therefore, the attainment of external material objects can be considered the fruit of **vedaniya** karma metaphorically. The cause of the attainment of external material objects in the paths of gods, hell, and the realms of enjoyment is the **leshya** (subtle karmic impressions) of those respective paths. In the realm of karma, there are many causes for the attainment of external material objects. Thus, one should understand the two types of **vedaniya** karma and their functions.