Last nights lesson was all about trying to create Kyo in your opponent by various techniques and then attacking.
I found this definition on Kyo:
"Kyo-jitsu (n.) Falsehood and truth. (Kyo denotes lack of mental and spiritual energy, while Jitsu is a state of full mental and spiritual energy. The key to Kendō is the ability to achieve a state of Jitsu, and to drive one's opponent into Kyo.)"