How long is the validity of a hexagram? If you are ill, will you live forever? thank you

Different things have different expiration dates, and when things are over, hexagrams are over. If a person is ill, divination is over; Or life is gone, and divination is over. It won't last forever. Some things the occupier can set a time limit, which will work within this time range. After this time, divination is over.