人皆養子望聰明，Everybody hopes his son will be brilliant.

我被聰明誤一生    My life is ruined by being smart.

惟願孩兒愚且魯，Wishing my son slow and stupid, 

無災無難到公卿。 ascending to his top without much effort. 

PS: As I get older, its easier for me to relate to Mr. Sus obviously ironic sentiments.