I think it would be better restated as 'when you've been doing it for a while you can make your mind blank all the time.'[0] But it turns out that even though

I think it would be better restated as 'when you've been doing it for a while you can make your mind blank all the time.'[0] But it turns out that even though this can be really peaceful, it is not as useful as keeping your mind just at the threshold of the blankness, with just enough thoughts and sensations left.[1] Why? Because you can use this state to investigate the workings of the mind, and to start to see how sensations cause thoughts, which can cause further thoughts and on and on etc. [2] Meditation in many Buddhist traditions is to be used as a tool of investigation. It makes the mind just calm enough to enable you to study it. It is a form of introspective psychology. An analogy from fluid dynamics: It can be almost impossible to predict the behaviour of a turbulent fluid, in fact this is one of the few remaining unsolved problems of classical mechanics. But we do have laws for laminar flows. In the same way, calming the mind just enough, can be a great way to learn more about its workings. And having experiential insight into how your mind works, not book knowledge, literally can change your life. I know it has changed mine. [0] The four 'Jhanas' (http://www.imsb.org/wp-content/uploads/2014/09/FourJhanas.pdf http://www.imsb.org/wp-content/uploads/2014/09/FourJhanas.pd...) [1] Access concentration. [2] Dependent co-arising. (Great analogy on that here: http://www.accesstoinsight.org/lib/authors/thanissaro/resonance.html http://www.accesstoinsight.org/lib/authors/thanissaro/resona...)