The intro and verses of the song is played by fingerpicking the chords G, C, Em7, D.
You can learn how to fingerpick that part from this link: https://youtu.be/WQxwYmcwdAw?t=1m20s
I've layed out a simple way of playing the chords without fingerpicking, but it isn't perfect.
Key: G
[Intro]
G C Em7 D
[Verse 1]
G C
Yeah, I've sinned,
Em7 D
Fell short of Your glory.
G C
Messed up, ain't proud of it but,
Em7 C
Your love is more than enough.
G C
You keep on keeping me, yeah.
G C Em7 D
[Verse 2]
G C
And don't know why You never left me.
Em7 D
I'm not sure but through it all,
Lord, You kept me.
G C
And I'm here by Your grace and love.
Em7 D
And You keep on keeping me.
[Pre-Chorus]
C G/B D
Ooo, You keep me
C G/B D
Ooo, ne - ver let go
C G/B D
Oo, You keep me
A
Safe in Your arms.
Am
No danger or harm's in You.
[Chorus]
G C
You keep on keeping me
Em7 D
You keep on keeping me
G C
You keep on keeping me
Em7 D
Ooo, You keep on keeping me
G C
You keep on keeping me
Em7 D
You keep on keeping me
[Pre-Chorus] 2x
C G/B D
Ooo, You keep me
C G/B D
Ooo, ne - ver let go
C G/B D
Oo, You keep me
A
Safe in Your arms.
Am
No danger or harm's in You.
[Bridge] 3X
C
No weapon formed
Em7 D/F#
No, shall prosper, no
G
Safe in Your arms
D G D/F# G
And You keep on keeping me.
[Pre-Chorus]
C G/B D
Ooo, You keep me
C G/B D
Ooo, ne - ver let go
C G/B D
Oo, You keep me
A
Safe in Your arms.
Am
No danger or harm's in You.
[Chorus]
G C
You keep on keeping me
Em7 D
You keep on keeping me
G C
You keep on keeping me
Em7 D
Ooo, You keep on keeping me
G C
You keep on keeping me
Em7 D
You keep on keeping me
G C Em7 D
[Vamp] x2
G C
I say, Over and over (over and over)
Em7 D
You keep on (keeping me)
G C
Over and over (over and over)
Em7 D
You keep on (keeping me)
G C
Over and over (over and over)
Em7 D
You keep on (keeping me)
G C
You keep on (keeping me)
Em7 D
You keep on (keeping me)
G
Over and over (over and over)
Over and over (over and over)
Over and over (over and over)
Over and over (over and over)
Over and over (over and over)
Over and over (over and over)
G C
You keep on (keeping me)
Em7 D
You keep (You keep me)
[Outro]
C G/B D
Ooo, You keep me
C G/B D
Ooo, ne - ver let go
C G/B D
Oo, You keep me
A
Safe in Your arms.
Am C
No danger or harm's in You.