The nature of our mind has always remained clear light unstained by delusions such as attachment and aversion.  Delusions, the minds of attachment and aversion, are temporary, fleeting moments of consciousness; they are impermanent.

Quote from Precious Teachings, by Khenpo Karten Rinpoche, page 43 in print version (48-49 in PDF version), “Essence of Buddhism as Related to the Four Noble Truths.”