When we embark on something new, we start with great energy and enthusiasm, but as time goes on, we begin to loose our passion to worry, depression and obstacles. This time, we don't have the same energy as we used to have when we started out. At this stage, we began to think of so many way out of which giving up on what we once believed so dearly is an option.
I don't know what you have been thinking, but giving up is never an option. If you give up now, you won't be where you purposed to be and it's not safe to go back to where you are coming from. You can stop, relax and plan again, but don't give up and don't quite. If you do, you will have your place among the mediocre.