Throughout Exodus 18 the narrator is obsessed with Jethro being Moses' father-in-law. He mentions it 13 times in 27 verses in this chapter. That is a full quarter of all the uses of the word "father-in-law" in the entire OT. And that's why I've titled this sermon "A Father-in-law's Faith." Brothers and sisters, as we will see in the course of tonight's sermon, this is an account of Jethro's conversion. It tells of a father-in-law becoming a worshipper of Yahweh. Moses evidently thought that was important, and that not the least important part of it was that Jethro was a father-in-law. As we'll see, that's because the overwhelming biblical emphasis, when it comes to fathers-in-law and marriage more generally, is the danger of corruption. But here, the opposite happens. Rather than corruption, the good news of God's salvation from his son-in-law and grandsons is what brings Jethro to know Yahweh. I hate to put it so provocatively, but the message of this passage is that even an in-law can come to faith in the LORD.