lhag mthong

lhag mthong is special insight, vipashyana in Sanskrit. This is the goal of Buddhist zhi gnas, first you still the mind, and train it to focus on an object single-pointedly, ting nge 'dzin. After this you focus your mind on lhag mthong, unraveling how reality really works. In the Buddhist system it has to do with emptiness, stong pa nyid, how to find out how things do not exist from their own side, but they exist dependently.

Now, many commentaries tells to alternate between zhi gnas and lhag mthong, if one focuses too much one either one, the mind could get tired or agitated. One needs to avoid these two dangers of meditation.