It is only through meditation that purity comes. Meditation means jumping out of the mind. There is no need to purify the mind, it can be put aside. One can become disidentified with the mind. To know "I am not the mind," is real purity because then you are only consciousness, awareness, a witnessing. To live twenty-four hours a day as a witness is the way of the sannyasin.
RajneeshAll methods of meditation are nothing but methods to help you to remember the art of let-go.
Rajneesh