Isaiah 40:30 (KJV)

What does Isaiah 40:30 mean?

Isaiah 40:30 says that even the strongest and most energetic people—youths and young men—will eventually grow tired, become exhausted, and stumble. The verse highlights that human strength, no matter how impressive, has its limits and will fail at some point.

In this part of Isaiah, the prophet is speaking to the people of Israel, who are weary and discouraged during a difficult time. Isaiah is making the point that relying on human ability alone is not enough, setting up a contrast with the next verse, which describes those who trust in God as being renewed in strength.

The Hebrew behind Isaiah 40:30

• "youths" (נַעַר, naʿar): This word refers to young men or boys, often seen as being in the prime of life and full of energy. Isaiah uses it to show that even those at their physical peak are not immune to weakness.
• "faint" (יֵעָפוּ, yeʿafu): This word means to become weary or exhausted, especially from exertion. It emphasizes the idea that even the most vigorous people can run out of strength.
• "weary" (יִּגָּעוּ, yiggaʿu): This word carries the sense of becoming tired or worn out, sometimes from hard labor or struggle. Isaiah uses it to reinforce the idea of human limitation.
• "men" (בָּחוּר, bachur): This word refers specifically to young men, often those chosen for their strength or ability. The verse singles them out to show that even the best among us can fail.
• "utterly fall" (כָּשַׁל, kashal): This word means to stumble or collapse completely. The repetition in the Hebrew ("utterly fall") stresses the totality of their failure, not just a minor setback.

Why Isaiah 40:30 matters

• Isaiah 40:30 clears up the idea that youth or physical strength is enough to carry someone through all of life’s challenges; even the most capable people reach their limits.
• The verse sets up a strong contrast with the next verse, where hope in God—not human effort—is shown as the true source of lasting strength.
• Understanding this verse helps the reader see the larger message of Isaiah 40, which is about comfort and encouragement for people who feel worn out and powerless.