一期一会(ichigo ichie)

Once in a lifetime experience

This is the tea master, Sen no Rikyu (千利休)’s brief for Japanese tea ceremony.

He believes that both the host and the guest have to do their very best at any angles to make each other happy when you are at a tea ceremony.

It is because each moment or situation is only one time, it will never be the same next time. Therefore you have to precious it every time.