When we held the calligraphy and tea ceremony at Raday museum in 2017, a Hungarian lady quoted the following HAIKU, which Zen comes in and becomes associated with, from Matsuo Basho.
Furu ike ya! The old pond, ah!
Kawazu tobikomu A frog jumps in
Mizu no oto The water’s sound
Basho heard not just a sound of water but a transparent sound in the dirty pond and he deeply understood what is even before the world came into existence. What is there even before the Earth appeared? It’s just darkness.