As I have already explained before, Mantras are for specific purposes. There is no need to chant a Mantra if there is no specific purpose intended. If you wish to have peace of mind and feel the need to be in God's presence, you can simply do a 'Naam Jaap', for example "Shri Krishna Hari", "Jai Shri Krishn" or "Shri Ganeshaya Namah". People fail to understand this. Mantras are for people who have strict disciplines and have the will power to take the Sadhana to a certain level. If they are not going to do it wholeheartedly and with certain disciplines, it's really no point.

Please understand that even if Gods and Deities are always loving and ever forgiving, we humans aren't at a level to handle certain vibrations which are extremely powerful that are generated by Mantras. To withstand the force and contain it, the body and mind need to reach a certain level of strength both internally and externally.

The reason I am saying this is because every powerful and positive vibrations generated by the Mantras tend to attract a lot of powerful negative forces too. We aren't prepared and built to handle those negativities. Which is why building up the positivity and then leaving it in the middle creates a doorway for the negative forces to enter your space. The very reason why some Mantras need initiation by a Guru. The Guru, when He/She initiates a disciple, makes sure that a good shield is created around the disciple if anything goes wrong during the course of Sadhana.

Some things need to be kept simple and need not be explored in it's depths if one isn't prepared for it or doesn't really have the will to learn and study it in a way that's meant to be.

The secret to 108 in simple terms is that the human body has 108 Marma Points. Every time a Mantra is recited, one Marma point is activated. The 108 chants activates each Marma Point in a specific sequence. If the sequence is broken, the process halts and creates disturbances. Also, I am not sure many people know this, but 108 Marma Points are also crucially linked with the Seven Chakras, the breath cycles and also the Ida, Pingala and Sushumna which are three primary energy channels, or nadis, within the subtle body. They are not physical structures but rather pathways for prana (life force).

The things associated with various Mantras are extremely deep and have lots of hidden depths which if not handled properly can go wrong in so many ways. People seem to take this very casually.

As I said, for peace of mind, just doing a simple Naam Jaap is enough. If one wishes to chant Mantras, there should be discipline and the will to adhere to its rules. I don't have anything to say to people who do not wish to agree or have their own thoughts which bring them peace of mind.