Extreme ownership by J. Willink and L. Babin. Quotes VIII

-A public display of discontent or disagreement with the chain of command undermines the authority of leaders at all levels. This is catastrophic to the performance of any organization.
-As a leader, if you don't understand why decisions are being made, requests denied, or support allocated elsewhere, you must ask those questions up the chain. Then, once understood, you can pass that understanding down to your team.
-Take responsibility; look in the mirror first; don't ask your leader what you should do, tell them what you are going to do.
-Despite the forceful pressure to comply, I had to take a step back and see the bigger picture.
-Know your target and what is beyond it.
-Jocko has always encouraged us to be aggressive in decision-making.
-In combat as in life, the outcome is never certain, the picture never clear. There are no guarantees of success. But in order to succeed, leaders must be comfortable under pressure, and act on logic, not emotion. This is a critical component to victory.
-Leaders cannot be paralyzed by fear. That results in inaction. It is critical for leaders to act decisively amid uncertainty; to make the best decisions they can based on only the immediate information available.
-Waiting for the 100 percent right and certain solution leads to delay, indecision, and an inability to execute.
-Act decisively amid chaos. My default setting should be aggressive, proactive rather than reactive. Instead of letting the situation dictate our decisions, we must dictate the situation.
-As a leader, you want to be seen as decisive, and willing to make tough choices.