And part of the purpose of this story is to explain The origin of the observance of the Sabbath, the seventh day, as a holy day.

这个故事的部分要旨是,解释庆祝安息日的起源，第七天是圣日。

耶鲁公开课 - 旧约导论课程节选

He has a clear purpose and he retains control throughout the story.

在整个故事中，上帝一直有很明确的目的，能控制局面。

耶鲁公开课 - 旧约导论课程节选