Since childhood we are listening the terms like jadu tona (black magic), nazar(evil eye), tantra and mantra. But, what these actually are ? These are simply called as negative energies which one is surrounded by. Energies cannot be created or destroyed, but they can be transferred. This shifting of energies could be on the people, things or place. When a negative energy is transferred on a person, his aura becomes negative, chakras lose balance, he loses his mind control and becomes physically and mentally weak. Same in the case of things or places. We all need protection from such energies and that is why we need samajyog.