The fact is we all get tired! Even the strongest of all. Yes, we all. But what makes the difference is the staying power. Sometimes, when we call it a quit, it is as a result of fear, ignorance, lack of experience and a few other vices.
To state the fact, the best way to still overcome all these is to face the work. The unwavering mindset that one can get the job done is even beyond the know-how.
The best of anything once failed at that thing but what makes the difference is the ability to stand through the storm, rain and fire. Nothing great is achieved easily and most things done quickly are not deep-rooted.