When training the mind, the idea is to get some depth rather than wandering around on the surface. Most of the world is on the surface; that’s materialism. It appears you can control it. We don’t see what’s moving, only what we think is moving. Depth needs to appear surface. Just look at the surface. That’s where the laminations are.
https://www.youtube.com/watch?v=SQLYdCedwNE