Selling

It doesn't matter wat your job or job title is, what kind of role you have in your team... at a certain point you will have to convince someone of something. Selling is something that is been done at every moment of the day by any person in the world.
Selling is not just a job or a career. It is essential to the survival and the well being of every living creature.
Doing well in life depends on the possibilities you have to sell to others where YOU believe in. That is why it is extremely important to learn to negotiate on how you can get an agreement from somebody else.

The possibility of being liked by somebody else, people who want to work with you, doing their best for you, ... all depends on how good of a salesperson you are. That is why selling is not just a job... it is a way of life.