"It's not in my head," said Bessie; "I can't get it there. I try and try to think how it can be, and I can't. Father, Son, and Holy Ghost, three Persons and one God," she repeated, slowly; "how can it be, nursey? I know the Father means our Father in heaven, and the Son means Jesus, and the Holy Ghost means Heavenly Spirit; but there's only one God, and I don't understand."