I think breaks are important because they help change your mindset. If you're emotionally wrapped up by something, it's much harder to be honest and critical. So taking a break gives you some space to kind of cool down, so you can come back to your work with a much clearer head and then be more critical and honest about it. Also, breaks are extremely important in general while studying or doing hard tasks. The effort you put into focusing takes up energy in your brain, it sort of builds up stress. Taking a break acts as if your brain is a battery and you're allowing it to recharge. If you want to learn more I'd look into "Cognitive Load" c: