Have you ever tried pooping in public toilets? Like in school, office, etc?
You sit in one of the cabin near other cabins. Now, you are little bit nervous because there is some other person sitting in the cabin next to you and he can listen to your fart, or sound of splash when your poop touches water :D.
You try to keep it low, or you just keep using flush regularly to suppress it. But somehow you know it is not going to help. You being nervous or afraid to get embarrassed, gets so uncomfortable to poop that you can't do it properly :p.
Now, consider you went to same toilet with your headphones on. Just like this:
As you can’t hear anything now, or you are so occupied with your favorite song, you will be able to poop properly. Mission accomplished.
Similarly, if you want to succeed in life, you need to focus on the only thing you want to do, regardless of what people will think/judge.
“Your success will be largely determined by your ability to concentrate single-mindedly on one thing at a time.”