For why wouldn't I?

I've become a fan. So please forgive me. But I love this part of the movie The Curious Case Of Benjamin Button where Elizabeth Abbot (Tilda Swinton) tells the story of her swimming through the English Channel. She admits that she wanted to. After struggling for hours she stopped. And hasn't done much with her life after that. Even though at the time, when asked about trying again, she has answered, "For why wouldn't I?".
This is the case with many of us. We give up too soon. While all the time, we were only one step too far.