How Do You Repair a Heart?

How do you unbreak a window?
How do you repair a heart?
If all it took was just some nails and wood
Then I would set to work to rectify your hurt
'Cause every stupid man must have his backup plan

What does this require to mend it?
Just how do you repair a heart?
The frame is cracked and you're not coming back
My life is sheer debris, a mess for all to see
But if I fit this there, will it make you care?

Yeah, yeah, yeah

Tell me, tell me, how do you unbreak a window?
And how do you repair a heart?
If all it took was just some nails and wood
Then I would set to work to rectify your hurt
'Cause every stupid man must have his backup plan

What does this require to mend it?
And how do you repair a heart?