““He underlines the distinction between mental nonengagement and the absence of mental engagement. The first is understood as the fundamental noninvolvement in dualistic appearances while sustaining fresh wakefulness, once discriminating knowledge has determined that there are no dualistic phenomena whatsoever. This can also be understood as mental disengagement in the sense of not interfering with the nature of the mind as it is. On the other hand, absence of mental engagement describes the mere absence of any mental activity, such as in a faint, deep sleep, or mental stupor, which does not lead to any realization or liberation at all. Thus, Kamalasila emphasizes that the first is a crucial factor in meditation, while the latter is obviously to be avoided.””