平常心是道
byo jo shin kore do
Everyday mind is the way. When Jo Shu Osho (趙州和尚) asked a question to Nansen Osho,(南泉和尚) zen master how to be enlightened.
Nansen osho's answer was "everyday mind is the way".
Rev Ito also talked about a book Mumonkan (無門関). This book is used to learn zen at zen monasteries. You can read more about this book from this link.
Click here to download recording of this teisho.