Didn't the Supreme Master Ching Hai often say that we disciples are all "big stones"? The cave is our wisdom-eye. This painting depicts the supra-worldly light that a bunch of "big stones" like us perceive during meditation.

In order to fully appreciate this painting, you have to look at it in a unique while. You will find the colors of the lights changing. If we view this picture with sufficient concentration, we will find it easier to focus our attention during meditation.