Start with why by Simon Sinek. Quotes II

-The reason gut decisions feel right is because the part of the brain that controls them also controls our feelings.
-When you force people to make decisions with only the rational part of their brain, they almost invariably end up overthinking. These rational decisions tend to take longer to make and can often be of lower quality. In contrast, decisions made with the limbic brain, gut decisions, tend to be faster, higher-quality decisions.
-A failure to communicate why creates nothing but stress or doubt.
-Great leaders and great organizations are good at seeing what most of us can´t see. They are good at giving us things we would never think of asking for.
-Great leaders are those who trust their gut. They are those who understand the art before the science. They win hearts before minds. They are the ones who start with why.
-When the why is absent, imbalance is produced and manipulations thrive.
-To lead requires those who willingly follow. It requires those who believe in something bigger than a single issue. To inspire starts with the clarity of why.
-For values or guiding principles to be truly effective, they have to be verbs.
-Everything you say and everything you do has to prove what you believe. It is at the what level that authenticity happens.
-Without a clear understanding of why, the instruction is completely useless.
-Authenticity produces relationships. Relationships build trust. With trust comes loyalty.
-Authenticity is when you say and do the things you actually believe.
-Loyalty comes from the ability to inspire people.
-No matter the manipulations you choose, this is not the way to build a trusting relationship.