Personally, I never want to quit anything I’ve started, especially if it concerns the academe or my future career after university. I don’t want to quit trying, working and exerting my best. Sometimes that’s a good thing. But the same resistance to dropping something has insurmountably hurt me in the past. Sometimes it’s also good to know when to let go of something that isn’t doing you any good because maybe that isn’t for you. You’re just going to disappoint yourself in the end. I’m not implying that you shouldn’t challenge yourself and live a careful, cautious life, just that you should know your limits and know when to stop if this thing you’re persistent on continuing is potentially ruining you as a person. For example (this is just hypothetical), a well-paying job you have been in for the majority of your employed life where you’ve attained great recognition in, but the same job keeps you from giving valuable attention to your family and your friends. The same job burns you out and leaves you a tired man that when you get home, all you can do is sleep. Another example is loving someone you know will never feel the same way. If you’re meant for each other, it’ll happen. You can’t force anyone to feel a certain way. And you’ll be hurting yourself in the process. So let go.