Not sure how to respond to "What type of person do you need to become…"

As I am working through the December workbook, I just got stuck on Page 23 where is asks “what type of person do you need to become to accomplish this impossible goal?” Having just finished describing my friend Dennis on the previous page, I am tempted to just say “I need to become Dennis.” Do I just reiterate all of the things that I say he thinks and does? And, by the way, how can I possibly become that person when I am not him? Thanks for any clarification and help you can provide! Gratefully.