Have you ever idealized the past so much that you forget God's faithfulness? Numbers 14 shows that this mindset caused the Israelites to rebel against God.
The book of Numbers puts God's holiness, sovereignty, and mercy on display. The Israelites grumble against Him, but He remains faithful to the covenant He made with them.
Looking at the eschaton, or the last things, is a tricky topic. But, it is important for us as Christians to be able to talk about it with open hands, recognizing the mystery of prophecy. Ken Boa connects the Feast of Tabernacles to the second coming of Christ.
The people whom God has called must be sanctified in order to reflect His holiness. The book of Exodus told the story of God redeeming the Israelites and calling them to be a holy nation. Now, Leviticus represents a guidebook for the new nation of Israel.