I mean one or twice experiencing getting stuck is tolerable. But when you experience frequent stagnation, it frustrates you. With frustration comes losing hope, getting angry, letting fear speaks loudly and even thinking of giving up. But, if you know at the bottom of your heart that you must not give it up, then take a break and trust that you will find a solution in another hour, day or even another week. You put your focus on some other aspects of your life and then get back to work again.