" Every day Zuigan used to call out to himself, "Master!" and then he answered himself, "Yes, Sir!" And he added, "Awake, Awake!" and then answered, "Yes, Sir! Yes, Sir!"
"From now onwards, do not be deceived by others!" "No, Sir! I will not, Sir!"

"

― Wumen Huikai , The Gateless Gate: The Classic Book of Zen Koans