(I don't own this song!)
I love this song, but I could only find one tab for this song on the internet, but 
it had tricky chords and it wasn't really detailed. So, here you go! 

Intro: D, A, Em, G x2

Verse:
D (xx0232@1)             AJoyful, (x02220@1)joyful, we adore You
Em (022000@1)           GGod (320003@1)of glory, Lord of love
D (xx0232@1)                 AHearts (x02220@1)unfold like flowers before You
Em (022000@1)           GOpening (320003@1)to the sun above

D, A, Em, G

D (xx0232@1)              AJoyful, (x02220@1)joyful, we adore You
Em (022000@1)           GGod (320003@1)of glory, Lord of love
D (xx0232@1)                 AHearts (x02220@1)unfold like flowers before You
Em (022000@1)           GOpening (320003@1)to the sun above

Bridge:
Em (022000@1)               GMelt (320003@1)the clouds of sin and sadness
Em (022000@1)              GDrive (320003@1)the dark of doubt away

Chorus:
A (x02220@1)                 Em (022000@1)      GJoyful, (320003@1)joyful, we adore You---
A (x02220@1)                        Em (022000@1)       GHearts (320003@1)unfold like flowers before You---
A (x02220@1)                 Em (022000@1)  
Joyful, joyful, we adore You
G (320003@1)        DJoyful, (xx0232@1)we adore You

A, Em, G

Verse2:
D (xx0232@1)                  AAll (x02220@1)Your works with joy surround You
Em (022000@1)             GEarth (320003@1)and Heaven reflect Your ways
D (xx0232@1)              AStars (x02220@1)and angels sing around You
Em (022000@1)            GCenter (320003@1)of unbroken praise

Bridge:
Em (022000@1)               GMelt (320003@1)the clouds of sin and sadness
Em (022000@1)                GDrive (320003@1)the dark of doubt away

Chorus
A (x02220@1)                 Em (022000@1)      GJoyful, (320003@1)joyful, we adore You---
A (x02220@1)                        Em (022000@1)       GHearts (320003@1)unfold like flowers before You---
A (x02220@1)                 Em (022000@1)  
Joyful, joyful, we adore You
G (320003@1)        DJoyful, (xx0232@1)we adore You

A, Em, G


A Capella: 
God, our Father
Christ, our Brother
All who live in love are thine
Teach us how to love each other
Lift us to the joy divine

Oh, God, our Father
Christ, our Brother
All who live in love are thine
Teach us how to love each other
D