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."