The Book of Numbers is a lesson in the importance of trust and obedience. The Israelites frequently failed to trust and obey God in the hours of their trials, and consequently God postponed His blessing. Most of them never enjoyed the good things that God had for them. Obedience to God is essential on our part.
". . . the point of the book of Numbers is important for God's people in any age: Exact obedience to God is crucial. Numbers makes the point most especially through examples of disobedience such as those found in chs. 11-21."293
The book also teaches us that the failures of His chosen human instruments do not frustrate God's plans any more than the opposition of His enemies can overturn them. The Israelites' unfaithfulness to God did not turn Him back from faithfully carrying out His commitments to His chosen people. I believe the outstanding characteristic of God that Numbers reveals is His graciousness.
"Perhaps the most prominent theme is that of the gracious providence of the Lord in caring for all of Israel's needs--militarily, physically, nutritionally and spiritually--in spite of constant rebellions by the people, both leadership and rank and file."294
The process of divine discipline is another important revelation. We see in Numbers how God deals with His people when they fail to trust and obey Him. On the one hand He does not permit them to enjoy what He has promised. On the other hand He works with them to prepare them to be stronger when they face the same tests again. Where their sin abounds, His grace abounds even more greatly. He makes the broken bone stronger at the place of the break than it was before the break.
Regarding the Israelites' and our entering into all that God wants us to enjoy, everything depends on one's attitude toward God. If we allow the giants and walls that stand between ourselves and God's will to block our view of God, we will fail. Unbelief will lead to disobedience that will lead to discipline that will lead to frustration and death. However if we see the giants and walls overshadowed by God, as Caleb and Joshua did, we will succeed. Trust will lead to obedience that will lead to blessing that will lead to progress and life.
"Let us therefore be diligent to enter that rest, lest anyone fall through following the same example of disobedience"(Heb. 4:11).