The book of Exodus is an allegory for the spiritual condition of mankind, & God's response. We're in bondage and need deliverance, and only the Lord can provide salvation. But even with that, we can fall into grumbling--a red light indicator of a deficiency of faith and entitled indulgence.  Our flesh pushes us into the negative and forgets God's goodness.  But He proves Himself over and over as Jehovah Rapha--the Lord our Healer.  We can always trust Him to meet any of our needs.  Video of this service is also available:  https://www.youtube.com/watchv=n8rDpv0syi8&t=3511s