Intelligence and sincerety
In order to be successful, we need two things: intelligence and sincerity.
Intelligence is needed to understand what needs to be done and how, what is the best thing to do in any given situation and what is the optimal way to do it.
Sincerity is needed so we can do things in a way that builds trust.
That means being honest and taking into consideration other people’s needs interests and concerns, not only our own.