Following mastery of the "generation stage", one practices the "perfection" or "completion" stage. The Indian commentator Buddhaguhya (c.700 CE), in his commentary on the "Mahavairocana Tantra," outlines the "perfection stage" practices thus:First you should actualize all the four branches of recitation for a while as before, and then analyze the manifestation of the created ("parikalpita") colour, shape, and so on, of your tutelary deity who is identical to yourself, breaking them down into atoms. Or it is also acceptable to do this by way of the reasoning that is unborn and unarising from the very beginning, or similarly by way of the technique of drawing-in the vital energy ("prana") through the yoga of turning your mind inside, or by way of not focusing on its appearance colour and shape. In accordance with that realization, you should then actualize the mind which is just self-aware, free from the body image of your tutelary deity and without appearance subject and object, and mentally recite your "vidya" mantra as appropriate.