When someone tells you that anything is possible, tell them to dribble a football.
-- Anon
In the UK to dribble a football means to keep it close to your feet as you move along the pitch - is that the meaning you refer to here? If so I can't make sense of the quote, because it's perfectly possible.
A monthly thread for posting rationality-related quotes you've seen recently (or had stored in your quotesfile for ages).