It means

What you don´t know about my carrer.

Everyone thinks that the career of business administration is easy

the true is that is not

business managers managers need to have knowledge about all areas

leadership

finance

mathematics

Law

Economics

international business

leaders are not born, they are made

A good leader is characterized by

Exit your comfort zone, risking taking on new challenges.

A good leader must learn to handle himself internally which means that he does not care what people think of him.

A collective and not individualist thought, that is, stops thinking about his personal benefit to achieve a team benefit

in most cases people become leaders when they go through a "crisol" stage

a transformative experience which is a difficult situation that leaders must pass

The first difficult situation may be that the person has received critical feedback

the third one is is a difficult personal experience such as a divorce or the death of a loved one

the second is a difficult experience in the workplace and finally