It means that if my descendants are like me, I don't need to leave him money, but the sage's too much money will kill his fighting spirit; If future generations are mediocre, there is no need to leave him money. Stupid but too much money will increase his mistakes.
This is a couplet written by Lin Zexu for later generations.
Extended data:
Lin Zexu shocked the world with his feat of banning smoking and resisting Britain, and was praised for his strict family management and good upbringing.
Lin Zexu asked his children, like himself, to be honest and clean as an official, not to be burdened by fame and fortune, and never to take a penny from people or subordinates other than wealth.