In this scripture Isaiah shared that even young men become exhausted and weary. Youth is associated with strength, so Isaiah makes the comparison between the physical strength of youth and those who wait on the Lord. Our waiting on God is having hope, trust and confidence in Him to meet our needs and to fight our battles. Our strength is renewed like the eagles because we can release the worry and stress associated with trying to solve our own problems. We run without becoming weary and walk without fainting because we rely on the strength of the Lord.
“Then he said to me, “This is the word of the Lord to Zerubbabel: Not by might, nor by power, but by my Spirit, says the Lord of hosts” (Zechariah 4:6). We become weary and exhausted when we rely on our own strength. The Holy Spirit within us is power for service and working through the believer increases strength. A powerful Christian is someone who is fully surrendered to the Holy Spirit. We are spirit beings having a physical experience, so as we feed our inner man, we grow stronger. As food is for the physical body, the word of God is food for our spirits.
“But he answered, “It is written, “‘Man shall not live by bread alone, but by every word that comes from the mouth of God’”” (Matthew 4:4). A bible deficient Christian is a nutrient deficient Christian. People become physically ill if they are malnourished and have a poor diet. A poor spiritual diet leads to spiritual malnutrition. In addition to reading the word is understanding and applying the word to work in our lives. This is exercising our faith muscle in order to increase in strength.
If you have ever done weight training at the gym, you know that regular exercise and strength training allows your muscles to grow and develop. It is the same thing with faith. Each person is given the same measure of faith, but some believers through regular exercise strengthen their faith muscles. Maintaining a workout routine takes discipline and consistency. Maintaining spiritual growth and maturity requires spiritual discipline and using the word mixed with faith to increase in strength.
“who satisfies you with good so that your youth is renewed like the eagle’s” (Psalm 103:5).