The lyrics and melody.
The lyrics and melody are often ahead of where you are. They lead you.
They’re ushering you along the path to join them in the mental and emotional place you want to be, even while you’re singing them.
When you commit to the function of singing those nots and those words, it has an effect on your spirit.
You don’t need to be in the perfect emotional state in order to sing the words. But rather, when you sing you will be helped into the emotional state.
Your spirit will catch up to what your lips are singing of.