Cherish the moment

He just smiled and handed me the origami crane (via):

Ten years later, as a high school student, Matsuda found herself thinking about that moment again. […]

“I started to think deeply about that time and tried to remember the details,” she said. “And I thought that maybe while I was on the phone with my grandfather, possibly [the man] wrote something on the paper.”

She hurried home from school and unfolded the crane to check. He had. Inside was a well-known Japanese expression about how every encounter is precious.

Roughly, it means “We should treasure each time we cross paths with someone because it might never happen again.” Or, more simply, “cherish the moment.”