“People who have studied a lot of the Dhamma and Vinaya — who have learned a large number of approaches together with their many ramifications — when they then come to train their minds, find that their minds don’t settle down easily into concentration. They need to realize that they must first take their learning and put it back on the shelf for the time being. They need to train “what knows” — this very mind — developing their mindfulness until it is super-mindfulness, their discernment until it is super-discernment, so that they can see through the super-deceits of conventional truth and common assumptions that set things up, naming them, “This is this,” and “That is that” — days, nights, months, years, earth, sky, sun, moon, constellations, everything — all the things that thought-formations, the conditions or effects of the mind, set up as being this or that.”
-Ven. Ajahn Mun, ‘Ever-present Truth’.