In Exodus 6, a genealogy is inserted betwixt the repeated story line. Most likely, the reason is to identify Moses’ and Aaron’s ancestral line as being true descendants of Israel. It is so we could make no mistake in knowing that these men are surely physical sons of father Abraham.
The text points to Aaron and Moses and says, “These are they…with whom I (God) spoke; whom I called to deliver my people Israel; to speak to Pharaoh.” These are surely those guys. The Moses and Aaron.
Interestingly, in the genealogy we find that Moses’ mother was named “Miriam” and Aaron’s wife was named “Elisheba.” Miriam is the same as “Mary” and “Elisheba” is as Elizabeth — just like Jesus’ mother and John the Baptist’s mother. The gospel (spiritual deliverance) is foreshadowed even right down to the names of these related women in this great story of physical deliverance. I just think that’s really cool.
The chapter concludes by restating God’s charge to Moses to ask Pharaoh to let his people go and Moses’ misspeech that was rooted in objection and doubt.
Isn’t it just like God to show us first who we are in him, call us to serve in a specific way, and then show us how we have failed in the past? The good news is that He doesn’t stop there. The gospel always lingers in the backdrop. No matter how much we fight and fuss, God continues to pursue us until we learn to walk in his will. He uses conviction and offers forgiveness when we misspeak and mess up. He reminds us of our mission and he makes us fit to work his miracles – as we will see with Moses beginning in chapter 7.
God doesn’t give up on his guys. God always grows them until they get his grace and display his glory.