It is common knowledge that sound has power, and with the sound of our voice we can communicate and respond. For example we say ‘yes’ when our name is called. Mantras are from vedas, which have supreme power, when ritually and properly chanted. We can invoke any power from Prakrithi, the Nature. Man in Mantra means-to think. Tra means to save. So “ Mantra ” means which saves by that thinking. Whoever thinks or meditates will be saved.
Wire is the medium to bring electrical power into the bulb. fan or television etc. Mantram is the power to make an individual or a stone to be the medium to bring the power of the Lord.