staying calm and entering meditative absorption when they have the vision. They can image their parents as lamas or as deities if this helps avoid feelings of desire for them. They can also contemplate that they are empty, like illusions and meditate on radiance and emptiness. Gelug presentation Tsongkhapa's commentary states that bardo yoga relies on the yogi's previous practice of tummo, radiance, illusory body and dream yoga. After all, the experiences of illusory body and clear light in waking and in sleep states is similar to the experiences in the post-mortem bardo. Thus, when death comes, one applies the same principles one used to attain the yoga of radiance/clear light in sleep:Should death arrive before supreme enlightenment has been attained, and one wishes to apply the yoga for enlightenment at the time of death, then [as the death process sets in] one engages the yogas of controlling the vital energies in order to recognize the clear light of the moment of death, using the same principles that were applied in the yoga of retaining the clear light of sleep. In this way one enters into the bardo experience, applies the techniques learned through the yoga of the illusory body of dreams, and generates the bardo body as the illusory body of the bardo.Thus, to achieve the clear light of death, one must go through the practice of tummo, the dissolution of the elements process and the visions leading up to clear light and so forth. One must have the ability to stabilize one's mind on an understanding of emptiness and the yogic means for inducing the four blisses to succeed. Tsongkhapa also states that there are two lesser methods, one is to cultivate the thought, "I am dead. These appearances must be bardo manifestations." This may help one recognize that one is in the bardo. Likewise, one can apply whatever samadhi one has acquired to the process of the dissolution of the elements at death. But these methods are inferior to the tantric practice of clear light yoga and lead to weak realizations. He also mentions "the oath of rebirth" where one "cultivates the aspiration to take rebirth into any of the pure buddha lands." Related traditions The six dharmas of Niguma are almost identical to the six dharmas of Nāropa. Niguma who was an enlightened dakini, a Vajrayana teacher, one of the founders of the Shangpa Kagyu Buddhist