Literally: Elder human is wise, elder ghost is powerful – The grown up / seniors are wiser as they have lots of experienced and have gone through numerous challenges in lives which made them wiser.
one should greet the host when entering their host, as one would pray when entering a temple; when in Rome, do as the Romans do [written and colloquial]
skillful enough to make good cusines but also presentable and elegant enough to entertain guests, a phrase to describe women who are good with housework and presentable at the same time [written and colloquial]