Colin Powell
The day soldiers stop bringing you their problems is the day you have stopped leading them. They have either lost confidence that you can help them or concluded that you do not care. Either case is a failure of leadership.
Avoid having your ego so close to your position that when your position falls, your ego goes with it.
Perpetual optimism is a force multiplier.
There are no secrets to success. It is the result of preparation, hard work, and learning from failure.