TL thank you for including the scroll, that’s been one of my favorites for a long time.
William Wilson renders it
“With the speed of a flash of lightning,
Cut through the spring breeze,”
and Takuan adds: “For the striking sword, there is no mind. For myself, who is about to be struck, there is no mind. The attacker is Emptiness. His sword is Emptiness. I, who am about to be struck, am Emptiness.”
I wasn’t expecting to grab my copy of the Fudōchishinmyōryoku for a series like this, I’m kind of delighted