No matter how old you are or how old you are, which poem is it?

"No matter who is over 60 or 28 years old" comes from the essay "Youth" by American writer samuel ullmann (1840.4.13-1924.3.21). He was born in Germany on 1840. When I was a child, I moved to the United States with my family, participated in the Civil War, and then settled in Birmingham, dealing in hardware and groceries. He started writing at the age of 70. His essay Youth is famous for Love of General MacArthur. Attach the article Youth: Youth is not a period of time, but a state of mind; Youth is not a soft knee with rosy cheeks and red lips, but a deep will, a grand imagination and a fiery emotion. Youth is the deep spring of life. Youth pervades Changhong, courage overcomes timidity, and enterprising overcomes Gou 'an. This spirit is born after the age of twenty, and it is more common for men in their sixties. Age is increasing, not getting old; Abandon your ideals and you will fall into old age. Years are long, and decline only reaches the skin; Enthusiasm gives up, decadence gives up the soul. Worry, fear, self-distrust bows the heart and turns youth to ashes. No matter how old you are, whether you plan to be 28 or 28, you have the joy of life and the temptation of miracles in your heart, as naive as a child. There is a sky in everyone's heart. As long as you receive signals of beauty, hope, joy, courage and strength from the sky and the earth, you will always be young. When the aerials are down, your spirit is covered with ice and snow, and you are covered with cynicism and self-denial. Even at 20, you are old. However, as long as you put up your antenna to catch optimistic signals, you may die young at the age of 80.