Natures first green is gold,
Her hardest hue to hold.
Her early leafs a flower,
But only so an hour.
Then the leaf subsides to leaf,
So Eden sank to grief.
So dawn goes down to day.
Nothing gold can stay.

By Robert Frost

Meaning

The things that are most beautiful in life are also the things that have the shortest lives. Nothing lasts forever. Frost says that the first leaves of nature and Eden was the most beautiful place to live. Neither of these beautiful things survived.

Similarly, every thing we go through, be it pain and difficulty or happiness and joy, it will all come to an end at some point.  The bad news is:  nothing lasts forever. The good news is: nothing lasts forever. How beautiful is it to live in a world where nothing lasts forever.  We need to learn to fall in love with the love inside us, only then every moment living will be worth dying for.