Medicine can only cure curable disease, and then not always

Similar sayings:

No medicines can cure the vulgar man No medicines can cure the vulgar man
The best cure for drunkenness is whilst sober to observe a drunken person The best cure for drunkenness is whilst sober to observe a drunken person
Reform a gambler-cure leprosy Reform a gambler-cure leprosy
If you always give, you will always have If you always give, you will always have
Learning is weightless, treasure you can always carry easily Learning is weightless, treasure you can always carry easily

Chinese sayings and proverbs