What movie is this line from, who says it and what is it in reference to?

“I know why you denied my sister. When I was younger… you used to hold my arm when I walked. Then suddenly you stopped. One day, I even tripped in your presence and nearly fell. I was faking, of course, but still you did not hold me. Sometimes we don’t do things we want to do so that others won’t know we want to do them.”