I agree with the sentence, the more you learn the more you earn..

for example you earn experience, knowledge and culture!

@Hayat 

I mean, learn what you really need for your life or like to know more about. Everything else to learn is useless and waste of time. You will not live forever. The other side of the coin, you may learn about things that have never happend the way the books say. 

@Peter

can you explain more please?

No and even you can lose a lot of your precious time.

I believe that the more you learn, you will understand that there are many things that you don't know yet...