Multiple sclerosis is the commonest chronic nerve disorder that occurs in young adults. It is characterised by progressive disability. The features of the disease include weakness, sensory disturbance, pain, and impairment of balance. Paul's book tells the story of the impact of the diagnosis of Multiple Sclerosis on a young fit man. It chronicles his determination to realise his potential in life by utilising his personal strengths and drawing on the ethos of 'smiling through adversity' that was instilled during his training as a Royal Marines Commando. I hope that his book will serve as an inspiration to all, but in particular to those who are challenged by multiple sclerosis or other chronic disease in early adult life. Sir Ranulph Fiennes