God’s terse first line in the Book of Genesis — “Let there be light” — was ready-made for the Twitter generation. If only the rest was as crisp, the British novelist Jeanette Winterson recalled thinking, as she began to reckon with that first book for a new theatrical project on the King James Bible. And then it hit her: Maybe God’s wisdom would crackle for a modern audience as Twitter posts of 140 words or less.