In the first lesson this morning, from the Book of Exodus, we're told about how the Jewish people, on their long journey through the desert, came to a place where they were without water, and they complained and accused Moses of falsely leading them out of the slavery of Egypt with false promises.
They got very angry and then, as we're told, they said, "Is Yahweh, God, with us or not? Is God with us or not?"
Moses was able to find a way, with God's help, to provide water for the people, and so he settled that quarrel but the question, "Is God with us or not?" is a question that is answered in a very powerful way in our other lessons today.