I think that this is how you play this song in the correct key, The chords are the 
same all the way through :)

F#             C#
I believe in nothing
         D#m              B
Not the end and not the start
F#             C#
I believe in nothing
            D#m          G#     A#
Not the Earth and not the stars

I believe in nothing 
Not the day and not the dark
I believe in nothing
But the beating of our hearts

I believe in nothing
One hundred suns until we part
I believe in nothing
Not in sin and not in God

I believe in nothing
Not in peace and not in war
I believe in nothing
But the truth and who we are.

Alternately, you could play it with a capo on first fret:

F             C
I believe in nothing
         Dm              Bb
Not the end and not the start
F             C
I believe in nothing
            Dm          G     A
Not the Earth and not the stars

I believe in nothing 
Not the day and not the dark
I believe in nothing
But the beating of our hearts

I believe in nothing
One hundred suns until we part
I believe in nothing
Not in sin and not in God

I believe in nothing
Not in peace and not in war
I believe in nothing
But the truth and who we are.

I hope that this is helpful :)