what the meaning of "never too old too learn ,never too late too turn" ?and is it a proverb?

How to say , “活到老，学到老”

There Is End To Learning During the time went by, more and more students end his senior school life and applied to college. When start their college life,they are so curiosity and interested in everything. It lead them to relax their study, and become leisure and no hard. But, as we all know, there is no end to learning. It is widely accepted that learning is so important for our life. Learning can increase our knowledge and improve our ability. And there has a prverb: never too old to learn, never too late to turn. No matter what the place we stay, we should keep a good habit at learning. So far as I concerned, learning is important for college students especially. As college students, we have more responsibility for society. Learning and workhard will offer ability to do responsibility. So we college students should studyhard and never stop to learn.