The prima facie sense of the assertion of Hebrews 9.23 that the heavenly things themselves needed to be cleansed is often rejected as fantastic or preposterous. Consequently, the verse is often read as describing the cleansing of conscience or the inauguration, not purification, of the heavenly tabernacle. Both interpretations are critiqued here. Positively, this essay argues that in Heb 9.23 Christ's sacrifice cleanses the tabernacle in heaven from antecedent defilement in order to inaugurate the new covenant cult. I argue that the structure of 9.23–8 and the manner in which Hebrews appropriates both cult inauguration and Yom Kippur support this conclusion.