Though the moon only reflects the light of the sun, its energy affects the water, and the mind. This is scientifically proven, which is why when someone goes crazy, they are called lunatics. (The word lunatic is derived from the word ‘lunar’ because the mind is connected to the moon.)
Ancient people did an in-depth study about how the moon affects the mind, how the moon is moving around in different constellations; how different degrees of the moon has a definite impact on the mind. That’s what they use the words ‘Tara-bal’ and‘Chandra-bal’. The moon is in one constellation for two and a half days, then it moves to the other constellation. So in two and half days there are changes in the mood of the mind.
The moon has an effect on water and our body contains a lot of water. Hence on the day of Purnima or Full Moon it is beneficial to do meditation.
Let us see how the moon effects our body: Indian ancient scriptures such as Vishnu Purana talk about the origin of the moon. According to this purana, the moon has emerged from the Milky ocean with his soft and snowy beams.
Food that we consume is converted into 2 parts – mind energy and prana. The mind energy is centered in the pineal gland area from which vital hormones get secreted.
The moon enters this gland to take control of all our activities from night till the time we wake up. The rays of the moon affect human beings, animals, plants, water and so on. Our body consists of 60% water. So, the full moon meditation helps the seekers in going inward, transcend the mind, and feel the divinity within.

- Gurudev Sri Sri Ravi Shankar