Coming to US

A student asked Sunim,” Sunim why did you come to the US?”

Sunim said, “Do you have anything more to declare?”
Later, the student asked again, ‘I have meditated with your answer many days, Sunim.
But still I don’t get it.
Why did you answer on that way?”
Sunim responded at once: “Welcome to the US.”
The student got awakened.