While dreaming, all kinds of things may come to mind, but these are nothing more than appearances. Likewise, a magician may create a variety of illusory appearances, but they do not exist objectively. Likewise, oneself, others, the cycle of existence, and liberation—in short, all entities—exist merely by the power of mind and convention.
From Transcendent Wisdom by H.H. the Fourteenth Dalai Lama, page 54