Youth is not a stage of life, but a state of mind. Youth is not pink cheeks, red lips and vigorous physique, but refers to the strong will and creative potential in rational thinking and the vigorous vitality in emotional activities; This is the clear spring of life. Youth means a temperament: brave and resolute, never timid, eager for adventure rather than seeking comfort. A 60-year-old man may have this temperament more than a 20-year-old boy. No one will grow old because of the passage of time, and only by giving up the ideal will they grow old day by day. Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul. Worry, fear and inferiority will only make people disheartened and turn into a pile of walking dead. Whether 60 years old or 16 years old, everyone's heart is attracted by novelty, and they all have childlike endless longing for the future and joy in life competition. There is a radio station in your heart and mine; As long as it constantly receives beautiful information from people and infinite time and space, as well as information full of hope, encouragement, courage and strength, you and I will always be young. Once this antenna collapses, your heart is covered with cold snow of cynicism and frost of despair. Even at the age of 20, you are old. But if the antenna is always in your heart, catching every optimistic wave, then there is hope that you will still have a young heart at the age of 80.