In this sermon, the speaker discusses the increasing difficulty faced by the Israelites in their servitude to Pharaoh. The officers of the Israelites cry out to Pharaoh, complaining that they are not being given straw to make bricks and are being beaten. However, instead of granting their request to go and sacrifice to the Lord, Pharaoh makes their burden even harder. Moses and Aaron are blamed by the Israelite officers for making their situation worse. Moses questions God about why he has treated the people so harshly, and Pharaoh accuses Moses and Aaron of causing unrest among the people. As a result, Pharaoh commands that the Israelites gather their own straw for brick-making, but the quota of bricks they must produce remains the same.

In this sermon, the preacher focuses on the story of Moses and his call to deliver the children of Israel from Egypt. Moses initially hesitates and makes excuses, questioning his own abilities and the likelihood of Pharaoh listening to him. However, God reaffirms Moses' calling and provides him with his credentials as a descendant of Abraham, Isaac, and Jacob. Despite the rejection from both Pharaoh and the Israelites, Moses and his brother Aaron continue to speak to Pharaoh on behalf of God. The sermon emphasizes the importance of believing in God's calling and the significance of one's background in fulfilling that calling.