Good manners wiill open doors that the best educatian cannot

It means to me that even though you can study very well,without manners you are nothing.For example,you can and you want to join the company.You can make it to their standards as you can do everything but they may not employ you as you do not have manners.However,if you do not have education but have manners,the employer might employ you as you can learn to do the stuff that needs to be done.But in my opinion, it would be better to have both education and manners.