Isaiah 40:29 means that God is the one who supplies strength when people have none of their own. The verse says he gives power to those who are weak and increases the strength of those who have no might, so the help comes from outside the person rather than from inner reserves. The words were spoken by the prophet Isaiah, who wrote to the exiled people of Judah, remembered as Israel or Jacob, who felt abandoned and worn down far from home.
He gives power to the weak. He increases the strength of him who has no might.
Isaiah 40:29 (WEB)
What Isaiah 40:29 Means
The verse begins with a plain claim: God gives power to the weak. In everyday terms, when you have run out of energy, patience, or courage, the source of what you need is not your own effort but God’s giving. The word “weak” describes someone who is depleted or unable to cope, not someone who has chosen to be lazy or faithless.
The second sentence goes a step further. God does not merely hand over a small amount of help; he increases strength for the one who has no might. The picture is of a person who has nothing left, and God adding to that emptiness. This is a promise about the character of God, who is able to supply what a person lacks.
The verse does not promise that hardship will vanish, that every tired body will be healed, or that every struggle will end on schedule. It describes how God relates to weakness: he meets it with power. Read in its setting, it is a reassurance that the one who made the earth does not run out of strength, and that he chooses to share it with people who have none.
The Context of Isaiah 40:29
Isaiah 40 opens a major section of the book of Isaiah, often called the book of comfort because of its tone after the warnings of earlier chapters. The prophet speaks to a people who feel that God has forgotten them, and the chapter answers that complaint directly. Verses 27 and 28 record the people’s question, asking whether their way is hidden from the LORD, and the reply is that the everlasting Creator neither faints nor grows weary.
Verse 29 sits in the middle of that answer. Just after it comes verse 30, which describes even the youths fainting and young men falling, and then verse 31, which promises renewed strength to those who wait for the LORD. Because verse 29 stands between a God who never tires and a human experience of exhaustion, it reads as the bridge that explains how divine strength reaches tired people.
Key Phrases in Isaiah 40:29
Psalm 46:1
God is our refuge and strength, a very present help in trouble.
(WEB)
This verse presents God as a refuge and a present help in trouble. It pairs well with Isaiah 40:29 because both describe God as the source of security and support in the middle of difficulty rather than someone distant from it.
2 Corinthians 12:9
He has said to me, “My grace is sufficient for you, for my power is made perfect in weakness.” Most gladly therefore I will rather glory in my weaknesses, that the power of Christ may rest on me.
(WEB)
Paul hears from the Lord that divine grace is sufficient and that power is made perfect in weakness. This connects directly with Isaiah’s language of God giving power to the weak, showing the same principle at work in the life of the early church.
A Short Prayer From Isaiah 40:29
Lord, I come to you today admitting that I have less strength than this day requires. I am tired in ways I cannot explain, and I have run out of my own resources. Thank you that you do not grow weary and that your understanding has no limit. Give power to me in my weakness, and add strength where I have none. Help me to rest in your faithfulness rather than my own striving. Amen.
