Give your opinion on the following statement: "He who opens a school door, closesa prison." (Victor Hugo) Use relevant arguments and examples to support your ideas.

In my opinion, that statement isn't completely true.
Hugo wanted to say that people who don't go to school don't learn anything and end up in prison because they steal things for living. I believe there are jobs that don't require a high school diploma. For example, you barely need to read, write and do some algebra to be a garbage man. 
In conclusion, who opens a school door may close a prison.