George Matheson emphasizes the significance of the Levites, who were overlooked and uncounted in the census of Israel, yet held a vital role in maintaining the tabernacle. He illustrates that while they may seem left behind in the world's activities, their duty to wait and watch is crucial for the survival of the nation. Matheson reassures those who feel unnumbered or sidelined in life that their quiet service is invaluable, as it supports the greater purpose of God's work. He encourages individuals to recognize the importance of their unseen contributions, as true greatness often emerges from behind the scenes.