Our life is a battle between the powers of light and truth the Gods who are the immortals and the power of darkness. These are spoken of under various names as vritra or vritras vala and the pains the Dasyus and their kings. We have to call in the aid of the Gods to destroy to the opposition of these powers of Darkness who conceal the light... we have to invoke the gods by the inner sacrifice and by the word all them into us that is the specific power of the mantra to offer to them the gifts of the sacrifice and by that giving secure their gifts so that by this process we may build the way of our ascent to the goal.