Sakti (Power) is of Two Types – Mental and Practical
Sakti (power) is of two types – one is mental, the other practical. During deep sleep these lie dormant in the body and do not get dissipated as in the waking state. That is the reason why the body becomes energetic as soon as it awakens. Owing to the sadhaka’s will sakti does not get wasted externally through the sense organs; it becomes turned inward towards the Self. Deep sleep is involuntary, hence it is a state of ignorance. On the other hand, Samadhi is voluntary and is a state of knowledge. For Ramana, the body was able, through this deep sleep state to sustain a state of tapas in later years.