无人应为其天性缺陷受全责;但若不加努力改正,便应受责。
No one is altogether to be blamed for the defects of his nature; but he is blameworthy if he takes no pains to correct them.  
人们还往往把真理和错误混在一起去教人,而坚持的却是错误。
The best way to predict the future is to invent it.