I've got the joy, joy, joy, joy

There are many possible lyrics. The most common opening lyric and chorus is as follows:

I've got the joy, joy, joy, joy
Down in my heart (Where?)
Down in my heart (Where?)
Down in my heart
I've got the joy, joy, joy, joy
Down in my heart (Where?)
Down in my heart to stay
And I'm so happy
So very happy
I've got the love of Jesus in my heart
And I'm so happy
So very happy
I've got the love of Jesus in my heart

Subsequent lyrics include:

I've got the peace that passes understanding down in my heart...
I've got the happy hope that heckles heathens down in my heart...
I've got the far out faith that freaks out farmers down in my heart...
I've got the glorious hope of my Blessed Redeemer way down in the depths of my heart...
I've got the mighty Messiah that manifests miracles down in the depths of my heart...
I've got the Bible Beliefs that baffle the Buddhist way down in the depths of my heart...
Well, if the devil doesn't like it he can sit on a tack...
I've got the Love Of Jesus Christ My Savior down in my heart...
I've got the wonderful Love of my Blessed Redeemer way down in the depths of my heart...
I've got the brightest light in the depths of my heart...