People are always reluctant to give up what they have, and are reluctant to live comfortably. But only in the face of pressure will inspire the huge potential, therefore, don't be afraid when we face the difficulties and setbacks, not when the greenhouse flowers, because even if can be safe and comfortable life, but life is not plain sailing, when adversity strikes, will be destroyed in the first place. Only those who have the willpower and the motivation to do so are often trained to "kill the dead". If you want to make a difference in your life, you must give yourself a cliff at the critical moment.