Rainbow is very long in the sky, and its colors are very rich, but life is like a mist, uncertain and fleeting. People's desires are endless, endless, just like a rainbow, across the sky, and the number of desires is as much as the color of the rainbow. Rainbow is eternal, but life is short. Only eternal desire has no eternal life.
The second sentence:
There is a world in a grain of sand and a heaven in a flower. Hold infinity in the palm of your hand. Eternity is only a moment. We think that butterflies are short-lived, but that is only the result compared with ourselves. Butterflies have their own pace of life. What they care about is the moment when they break out of the cocoon, and all the time before the moment of qualitative change is for that moment.