鸡汤背后也可以有个哲学解释的。Similarly fear is an emotion indispensable for survival; it indicates danger, and without that warning sense no living thing could last long. The courageous man is not one whose soul lacks this emotion or who can overcome it once and for all, but one who has decided that fear is not what he wants to show. Courage can then become second nature or a habit but not in the sense that fearlessness replaces fear, as though it, too, could become an emotion. Such choices are determined by various factors; many of them are pre-determined by the culture into which we are born-they are made because we wish to please others. But there are also choices not inspired by our environment; we may make them because we wish to please ourselves or because we wish to set an example, that is, to persuade others to be pleased with what please us. Whatever the motives may be, success and failure in the enterprise of self-presentation depend on the consistency and duration of the image thereby presented to the world.