Why do you sing Hallelujah if it means nothing to ya?
Why do you sing with me at all?

Why do you feel my sorrow with the words you borrow?
From the only place that you know?

- "Delicate" by Damien Rice

In plain English, I believe it means:
Why do you rejoice with me if you don't know me?
Why do you ever try to comfort me if you don't know me?

These are the most true words.
These words also reflect the deepest, most desperate call:
Who really understands me?