The qawwali is an acquired taste, and takes huge amounts of patience. The good thing is that like classical music and dance, if you 'tune in' then you don't need technical knowledge. I must emphasise, and I am being a tad bit defensive, that 'Allah' here could be seen as a superior power, even a superior self.
This poem by Kahlil Gibran is an extension of what I was attempting to say at the beginning:
Have I spoken this day of aught else?
Is not religion all deeds and all reflection,
And that which is neither deed nor reflection, but a wonder and a surprise ever springing in the soul, even while the hands hew the stone or tend the loom?
Who can separate his faith from his actions, or his belief from his occupations?
Who can spread his hours before him, saying, "This for God and this for myself; This for my soul, and this other for my body?"
All your hours are wings that beat through space from self to self.
He who wears his morality but as his best garment were better naked.
The wind and the sun will tear no holes in his skin.
And he who defines his conduct by ethics imprisons his song-bird in a cage.
The freest song comes not through bars and wires.
And he to whom worshipping is a window, to open but also to shut, has not yet visited the house of his soul whose windows are from dawn to dawn.