These chords are very minimal  
I don't recommend strumming full chords 
For the most part, I play the 1 and 3 of each chord 

verse 1: 

I have seen it all all 

I have seen it all 
      E5    G#m 
I've felt it all 
A           
Life is running swift now 
                    E5   G#m 
Like a raging river, how it runs out 
              A 
Please don't go 
              E 
Please don't go 



[Refrão]
                  A       C#m 
Cause this is the best part 
        F# 
Lying awake in the dark 
            A   C#m 
This is the best part 
                 F# 
Hearing the beat of a heart 

A 

verse 2: 
A 
I have seen it all all 
A 
I have seen it all 
       E5 G#m 
Have I felt it all 
A  
Time is old and young 
                            E5 G#m 
Oh, glitter moments fleeting on my skin 
               A 
Pause in the glow 
               E 
Pause in the glow 




[Refrão]
                  A      C#m 
Cause this is the best part 
       F# 
Lying awake in the dark 
            A     C#m 
This is the best part 
              F# 
Here in the beat of a heart 
            A     C#m 
This is the best part 
        F# 
Lying awake in the dark 
            A     C#m 
This is the best part 
               F# 
Here in the beat of a heart 

Outro: 
C#m   F#m

A  F#m  (3x)