Nothing Gold Can Stay
Mood:  not sure
Topic: Poetry, Songs, & Fanfic
This poem is by Robert Frost, called Nothing Gold Can Stay. It seemed to me that it could be applied to Sirius' short time being there for Harry.

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