God used Joseph and Moses to fulfill His promise to Abraham to make a great nation and be a blessing to all nations. Joseph was sold into slavery in Egypt but rose to a position of power, saving the Egyptians and surrounding nations from famine. Moses was called by God to deliver the Israelites from slavery in Egypt, confronting Pharaoh with ten plagues that demonstrated God's power over the Egyptian gods. The Exodus was meant to show God's saving power and make His name known throughout the earth.