Cloudless Sky, Kongtrul Rinpoche.
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Student: In order to actualize Bodhichitta, the desire to remain in samsara untill all beings have attained Buddhahood, does one have to remain in samsara untill all beings become Buddhas?
Rinpoche: If someone genuinely feels this way and is not merely paying lip service to the idea or trying to contrive it, this in itseft speeds up his or her own realization of Buddhahood. This is the "trick" of Mahayana. However, one cannot deliberately use Boddhichitta as a trick, since the desire to lead all beings to enlightenment must be genuine and unfabricated. One will then be able to progress quite rapidly along the path and achieve either enlightenment or higher boddhisatvas bhumis for the benefit of beings. Only then is one really able to lead all beings to Buddhahood.