Time.

It's interesting how we can get irritated at things we like,

just because we know we can't have it.

It's not its fault. It's ours. 
So why do we hate it?

Why do we spend our time on getting angry with it?

See how Item and Time is the same word? 
See how when we loose one, we loose the other?

Don't loose it, because you are envious.

Love it for it's beauty.