Who was it written for? Who was it written for? How was the complete version written?

This sentence came from a fable in " Chuang Tzu: Carefree Wandering ". It was called " A great roc rises with the wind in one day and soars up to 90,000 miles." The story was about a giant bird, a giant roc, who met an old man while flying. The old man told him,"I am born to be useful." This sentence became a classic saying in ancient Chinese culture that was widely spread and applied. As for the complete version of this sentence, it can be found in Zhuangzi: The great roc soared ninety thousand miles in a day with the wind. If the wind stopped, I could still fly away. The ancients said: I am born to be useful, thousands of gold scattered to come back. It is suitable for many people to believe that as long as they give full play to their talents, they can pick themselves up even if they encounter setbacks.