Tilopa states:By means of these yogas, at the time of transference and also of forceful projection into another body, the yogi can utilize the mantric seed syllable of the deity and train in the deity yoga practice in conjunction with the exhalation and inhalation the breath, long and short, and project consciousness to wherever is desired. Alternatively, those desiring to transfer to a higher realm can apply themselves to two syllables of "YAM", and also "HI-KA", and "HUM-HUM". Consciousness is thrown to the heart of the deity inseparable from the guru, and from there to whatever buddhafield is desired. This too is the instruction of Sukhasiddhi.