This life offers only a window of time and opportunity to work for the Lord. Youthfulness and old age both offer their own hindrances to service. In many ways, though not entirely, youth should be spent in learning, middle age in doing, and old age in teaching those who are learning and doing. Many of the greatest servants of the Lord found in scripture began their journey in youth by learning of the Lord and His ways (1 Kings 18:12; Psalm 71:5; 2 Chronicles 34:3; Job 29:4; Ecclesiastes 12:1). As they approached the prime of life, they invested their learning by serving the Lord (Numbers 8:24-25). As they passed their prime, they would pass their knowledge on to the next generation in hopes of the Lord’s work continuing and flourishing (2 Timothy 4:1-8)..
Unfortunately, some Christians have become convinced that old age serves as a sufficient excuse for a lack of service to the Lord’s work. Granted, the field of one’s service may change, but there should always remain a willingness to serve. For instance, Moses received his initial call to deliver Israel at forty years old (Acts 7:23) but did not lead God’s people out of Egypt until he was eighty (Exodus 7:7). When he died at 120 years of age, he remarked that “his eye was not dim, nor his natural force abated” (Deuteronomy 34:7). At forty years of age, Caleb received a promise from Moses concerning the possession of land in Canaan (Joshua 14:7-9). Forty-five years later, Caleb took possession by driving out the mighty Anakims (Joshua 14:10-12). Caleb did something in his old age that many of the young men could not or would not attempt (Joshua 17:13).
At the age of forty, Moses fled Egypt in fear for his life (Exodus 2:11-15; Acts 7:20-29). It is not hard to imagine the degree of fear sensed by Moses as he ran from the most powerful man who ruled the most powerful nation on earth during his day. Today's verse reveals that Moses yet again departed from Egypt, forty years later this time, not fearing the wrath of the king. What made the difference? How did Moses keep from losing his mind during such a difficult time of trial? How did he endure the troubles associated with leaving Egypt? He endured because he saw “him who is invisible.” He saw God! He did not see the Lord simply with his physical eyes, but rather through the eye of faith. Moses endured for one reason, the Lord was with him and he knew it. Endurance becomes possible as the believer learns to acknowledge the presence of the Almighty in his or her life.
