I should note that I don't think the bass plays at all for the first measure. I extrapolated those notes based on the first two measures of the second line.
The lyrics here are:
You do something to my soul
That no one's ever done
If you're looking for to love
Then let me be the one
The bass part musically represents two ideas in these lyrics.
The song is in A major, but there are two accidentals (F natural and Bb), which represent the foreignness of "something... that no one's ever done."
The song is in A major, but there are two accidentals (F natural and Bb), which represent the foreignness of "something... that no one's ever done."
After the line "Then let me be the one," the bass repeats a single pitch (an E), representing that idea of singularity.