Beauty, sweet love, is like the morning dew, Whose short refresh upon tender green, Cheers for a time, but till the sun doth show And straight is gone, as it had never been.

This quote is saying that beauty, like love, is fleeting and limited in duration. It’s like the morning dew, which briefly refreshes the land with its dampness. But as soon as the sun rises, the dew has disappeared without a trace – it is as if it was never there in the first place. Similarly, beauty and love are just as fleeting, with their time together limited and brief.