It is also possible within this lifetime to enhance the power of the mind, enabling one to reaccess memories from previous lives. Such recollection tends to be more accessible during meditative experiences in the dream state. Once one has accessed memories of previous lives in the dream state, one gradually recalls them in the waking state.
Consciousness at the Crossroads: Conversations with The Dalai Lama on Brain Science and Buddhism (1999) ISBN 1559391278