Are you ready to undertake? Do you have the motivation to undertake? Is your personality adapted to your project? Do you have the necessary skills to carry out your project? ...All these questions should invite everyone to discover their personality before any professional or sentimental initiatives in an era dominated by numerous scientific and technological advances. Thus, this manual, which is meant to be personal and for individual use, aims to encourage its holder-user to discover the secrets hidden in his person. It opens to all mental bodies (21 years old), the possibility of discovering their personal powers in order to become who they simply are.