Japanese tea ceremony was created by incorporating of Zen.
That’s why its manners and rules are based on Zen concepts.
Adopting Zen frees you from the multitudes of everyday thinking.　
Zen thinking and meditation are extraordinary and easy to experience.
If you put it into practice, you can clear mind.
In addition, it makes you feel refreshed and easy to come up with ideas. For example, making tea is said to be a meditative state.
The reason for this is that concentrate only on making tea.