In my opinion，it's right

What do you do that makes you feel like you've conquered the world? You feel that no one can deflate your balloon. A doctor heals people. This can be his method of feeling invincible. By helping one person, he feels he has "reached the top". A singer wants to sing in front of 5,000 people. She takes voice lessons, and she practices her singing. She sings in front of 100 people, then 1,000, then 3,000 people. When she sings in front of 5,000 people, she feels invincible. A teacher can teach a certain lesson to her students. One student does not understand the concept. The teacher can try as hard as she can to make the lesson simpler for the one student who doesn't understand. As soon as the student understands (and the "light bulb turned on"), then the teacher can feel invincible. She feels like she conquered the world in helping that one student. I hope this helps.