Question
I would like to know whether you are familiar with phosphenism. If so, do you see a connection with Zen?
Anonymous
Answer from Master Kosen
Yes, I know phosphenism and the work of Le Fébure (I no longer remember how his name is spelled). It is very effective for developing focus. Be careful about the light bulbs you use; you can also use the sun. The connection between Zen and phosphenism is me.
Kosen