I've seen a lot of different versions which are good, but not entirely correct.  
Here is my take on the iTunes Originals version.  
I think it's pretty accurate.  
Just listen to the song, to get the rhythm and chord placements. 
There is a transition between the G and the Bb2 in the chorus.
If you want to play it, it would be something like a G/A chord.
However the song is great without it. 

Please rate!

Intro/Verses: C  Csus4  C  G/C  Fmaj7/C  F  Fmaj7/C

Verse 1
I'm finding myself at a loss for words, 
And the funny thing is, it's okay.
The last thing I need, is to be heard,
But to hear, what you would say


Chorus:
                C
Word of God speak,
                           G
Would you pour down like rain
           Bb2
Washing my eyes to see
     F
Your majesty
                C
To be still and know
                    G
That You're in this place
              Bb2
Please let me stay and rest
         F
In Your holiness
            C
Word of God speak


(Repeat Intro)


Verse 2
I'm finding myself in the midst of You
Beyond the music, beyond the noise
All that I need is to be with You
And in the quiet hear Your voice


[REPEAT CHORUS 2x]


I'm finding myself at a loss for words
And the funny thing is it's okay