人老精，鬼老靈 [－－－－－－灵]
Jyutping
jan4 lou5 zeng1 ，gwai2 lou5 leng4
Pinyin
rén lǎo jīng , guǐ lǎo líng
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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.