if at first you dont succeed, try, try, again

If at first you dont succeed, try, try, again is a very common and well known proverb which means that you should keep trying until you succeed or get what you want. It is also a way to say how importance practice is because the more you practice and attempt to do something, the higher the chance you have of succeeding. This phrase is saying that even if you dont get it right the first time, you should keep trying until you do.