Originally Answered: I want to write a musical/opera but can't come up with a topic that I like?
Genesis would be a good biblical story. It starts out with a void (silence) followed by the creation of the earth out of chaos. The creation of light can be very dramatic in an opera, not only because of the musical possibilities, but also because a sudden bright light occurring at the same time as a powerful chord would be unforgettable. After all the powerful music of God and the universe, you would get the human story of Adam and Eve, which would be the main focus of the opera. The creation of the universe would be the overture. It should be long, perhaps twenty or thirty minutes, plus there should be a narrator, either singing or reciting the opening verses. But as I said, the main focus should be Adam and Eve. The story of Cain and Abel would probably be too much, I would end the opera with Adam and Eve walking away from Paradise.
As for research, I suggest you look at Haydn's Creation. For the void, look at the prelude to Tristan and Isolde, which has dissonant harmonies which don't resolve (perfect). For God, there are several good examples, such as Bach. I think Albert Schweitzer write about this subject, but I would have to check.
I'm a young composer. I hope you e-mail me.