These days I always listen one song "Let Her Go". Why I liked this song is not I can feel its beautiful tune while I am laying in my bed comfortably, it is something that I like its the philosophy reflected by this song.

...

Well you only need the light when its burning low
Only miss the sun when it starts to snow
Only know you love her when you let her go
Only know you've been high when you're feeling
low
Only hate the road when you're missing home
Only know you love her when you let her go
And you let her go

...

Things we take it for granted until we lose it we find this feeling and ask why didn't we cherish it at that time. Can time to go back again to fill in this blank?