Concentration and Imagination

In some schools, like the Tantric Bus schools, you also find techniques to work with imagination. They have to study very deeply in advance a whole sequence of stages of imagination that they have to project in their minds with their eyes closed. That is not physical. Those images are being projected but not physically. None of them else can see them. So we see here two capacities of consciousness, concentration and imagination. In Sanskrit, those are Shemata and Vipasyaṇa. And usually in English, they're translated as kamabhaitin and insight. But I like the simpler explanation, concentrate and imagination.