To see our uniqueness expressed in our achievements, we must first learn the rules - and then how to change them completely. Charles Darwin began as an underachieving schoolboy, Leonardo da Vinci as an illegitimate outcast. The secret of their eventual greatness lies in a 'rigorous apprenticeship': by paying close and careful attention, they learnt to master the 'hidden codes' which determine ultimate success or failure. Then, they rewrote the rules as a reflection of their own individuality, blasting previous patterns of achievement open from within.