Original artwork, not a still
Let your plans be dark and impenetrable as night, and when you move, fall like a thunderbolt.
Behind the line
What it means
Our interpretation.
The advice is to keep one's plans utterly hidden, as dark and impossible to see into as night. Then, when the moment to act comes, the move should land suddenly and with overwhelming force, like a thunderbolt. Secrecy beforehand and shock in the moment are meant to work together.
Context reviewed
