Roshi speaks of becoming the whole Zendo while we sit. How does one actualize this same state of mind while in day to day activities at work, in traffic etc?

When sitting in the zendo we can completely focus on our mind, since we have no involvement with the outside world. Then there is also the aspect of working on our state of mind in the midst of our work. We open our awareness, put energy into our Tanden, and with our taught state of mind we hear, we see, yet our mind gets stopped nowhere. We work on our mind not stopping anywhere. Doing this in the zendo is easier, yet outside it is a real challenge. But that is where the real Zazen is.