Waters are the currents of power of light and strength from the higher planes flowing towards the earth. Rain water and the river currents are only physical aspects fo these subtel powers. These currents fill with the sap of their delight the subtel bodies of rishis and also the consciousness of the persons who are receptive. These currents have power to take away physical and psychological diseases. They have the power to remove evil also, a power which is not possessed by the ordinary water. Only the power of grace can take away evil .These currents enable the rishi to have the subtle vision of the spiritual Sun.

It is not possible for any one to have the vision of the Supreme till the bodies, physical an subtle are ready. A body which is not prepared by the practise  of tapas will breakdown at the onset of certain spiritual experience. Hence the rishi prays to the currents of power to strengthen all our bodies so that these subtle bodies can sustain the forces which enter the body. Then we could have the vision of the Supreme Divine.