mind

i think that there are two levels of the mind.
there's the level of the mind where we accept the things that we have been told without wondering why, and there's the level of the mind where we don't understand those things at all. almost everyone uses the first level all the time. i think that to be enlightened means to be able to use the second level all of the time. that's why the tao te ching says to empty your mind.