Ryan Holiday's book "Stillness Is the Key" describes a way to attain an age-old but urgently required way of life. He uses Confucius, Seneca, Marcus Aurelius, Thich Nhat Hanh, John Stuart Mill, and Nietzsche, among other great thinkers, to show that stillness is more than just not doing anything. Instead, it is the key to self-mastery, hard work, and focus. Holiday also looks at individuals who embodied the power of stillness, such as baseball player Sadaharu Oh, Winston Churchill, Fred Rogers, and Anne Frank.