One day a man found a cocoon(茧) of a butterfly in the forest. He sat there for several hours and watched the butterfly. Suddenly a small opening appeared, and the butterfly struggled to force its body through that little hole. Then it seemed to stop making any progress. It appeared as if it had gotten as far as it could go no further. So the man decided to help the butterfly.
He took a pair of scissors and cut off the remaining bit of the cocoon so that the butterfly could come out easily. Much to his surprise, the butterfly got a swollen body but very small, weak wings when it came out of the cocoon.
The man continued to watch the butterfly because he expected that the body would grow smaller at any moment and the wings would enlarge and be able to support the body. But neither happened! In fact, the butterfly spent the rest of its life crawling around with a swollen body and small wings. It was never able to fly.
The man was in his kindness, but he did not understand the nature rules. The struggle required for the butterfly to get through the tiny opening was God's way of forcing fluid (流体) from the body of the butterfly into its wings so that it would be ready for flight once it achieved its freedom from the cocoon.
Sometimes struggles are exactly what we need in our life. If God allowed us to go through our life without any difficulties, it would make us fail. We would not be as strong as we could have been. And we could never fly.