When I look at the article basically the authous are make a  statment .This statement are adult can learn English Well. 

 So what happen are the when we learn a new language ,If we are childhood , you are learn very fast and when the adult is learn very slow , inside write that is not true ,but we need to learn like baby ,so the baby learn creative ,they learn cariousty , they like to touch anything , because the baby want to know that things ,baby want to learn .

  But adult go to the oppsite way, we are work work work all the time ,we do not like to ask the question and the things is we are street out all the time , we are more nagative than the baby . we got a lot of thing to do ,we also got regreat what we are doing .

 Can we learn English like baby ? Yes ,but not 100% , but I think If we use the two thing,normally are not that problem. one is this things are importance to you ,If the things make you importance ,than you will do it and less than give up. second you must have a good way to do it , such as you love it so how to love ? You know how to love your girl friend ? yes use that love to learn the stuff , when you love something  5 hours for you just like 5 mintes ,If you hate something 5 mintes like 5 hhours that is super painful,this is one way .Also you need to found a good teach way ,this is the other way , and If you do it  those two things right ,will be not a problem , Finally will amazing for you.