Good things never last forever

Take it in, all at once 
You never will know, 
When it's all going to be done.
The best day, the best night
In your memories, will remain
And you wish, it could have stayed.
But that's when life comes into play,
When hopes and dreams 
All come true,
It gets over too quickly 
And to ever have thought 
It'll stay forever
Please remember, good things 
Never last forever.