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The Tattvarthasutra is born through birth, and it pertains only to gods and hell. The cause of artificial vibrations is "labdhi." "Labdhi" is a kind of generated power; which is found in some womb-born humans and non-humans. Therefore, those who can possess the body of artificial vibrations can only be womb-born humans and non-humans. Another kind of generated power is also considered the cause of artificial vibrations, which is obtained from birth itself and is not generated. Such labdhi is considered to be present only in some air-breathing beings. Therefore, they too are the possessors of labdhi-generated – artificial – bodies. The digestive body is artificial. Its cause is a specific labdhi; which is not found in any species other than humans; and even among humans, it is found only in specific ascetics.
Q: What is the specific ascetic?
A: The one who has attained the fourteenth stage.
Q: When and for what purpose do they utilize that labdhi?
A: When they have doubts about some deep subject, they use it to eliminate those doubts. In other words, when any of the fourteenth beings have doubts about a profound subject and do not have a comprehensive resolution, they consider it impossible to move into another realm through the body of a dark being and utilize the specific labdhi of the father. Through it, they create a small body similar to a hand. Since it is produced from auspicious merit, it is beautiful, created with worthy intent.