Read the first paragraph of a narrative essay.

What does the sentence in bold do?

A janitor changed my life. I was at a low point, ready to quit everything–even when I had it all. I didn’t realize how lucky I was. At 5 foot nothing, 100 and nothing pounds, I was hardly your typical football player. But, that didn’t stop me from believing that I could play for Notre Dame. It turns out, the most important part of achieving my dreams is believing in myself.