Be careful how you spend your time: Spend your time in nothing which you know must be repented of.
I couldn't speak Japanese very well, passport regulations were changing, I felt British, and my future was in Britain. And it would also make me eligible for literary awards. But I still think I'm regarded as one of their own in Japan.
Make sure you never, never argue at night. You just lose a good night's sleep, and you can't settle anything until morning anyway.