There is no "act" of liberation. All actions of the conscious mind reinforce it, not liberate us from it. That won't help either. Even illusions are based on some sort of perception. Something is there, but it's not what we think it is. There is no work possible to this end. That's the basic conundrum of zen. Purifying the mind can only be an action of the mind, and is thus impure. Agree to some extent. The mind never goes away, but that's fine as long as we know it's just a utilitarian construct of the brain, an edifice of thought that is not our true self and is created by something we cannot know. Once the bubble is broken, that's it. You can never again take "mindfulness" seriously. Where is this mind that I can be full of it? At best, it's a useful trick, like Buddhism itself. As the saying goes, the raft lets you cross the river, but it's pointless to then carry it around on your head. It's the only kind of existence there is. The mind can be conflicted, but the body knows best. I'm sure there are situations where you need a mind to solve a problem, I'm not concerned with such issues, they are beside the point.