Who determined its measurements — surely you know! Or who stretched the line upon it?
Job 38:5 · ESVView all translations

At last God speaks to Job, and He answers with questions instead of explanations. They start with the earth: who measured it, and who stretched the line across it — and the aside "surely you know!" shows he cannot say.

The questioner questioned

Job had spent chapter after chapter demanding that God explain Himself. When God answers, He reverses the roles and puts Job in the witness box.

"Who is this that darkens counsel by words without knowledge?" He does not mean that Job did not know Him at all. But He did mean that his knowledge was limited, and that he had no adequate knowledge of the dealings of God. Job had been questioning the dealings of God. Now God turns it back on him; now He says, I am going to ask you, and answer Me like a man if you can. "Where were you when I laid the foundations of the earth?" What an overwhelming question! What did Job know about it? "Who determined its measurements — surely you know!" He did not know. "Or who stretched the line upon it?"

William Kelly

An examination Job could not pass

The words "surely you know" invite an answer Job cannot give. He knows only that God could have done it.

"Who determined its measurements — surely you know!" (v.5). Of course Job knew that only God could do this. "Who stretched the line upon it? To what were its foundations fastened?" (v.6). Certainly the foundations of the earth are not fastened to anything visible to us. Whether Job knew this at that time or not, he could not answer God's question.

Leslie M. Grant

Measure and line

One writer hears an echo of this verse in Paul's own talk of measure.

It almost looks as if Paul were alluding to God's work in creation, as stated in Job 38:5, where God Himself asks, of the earth, "Who determined its measurements — surely you know! Or who stretched the line upon it?" He is a God who works by measure and by line, whether in creation or in the administration connected with His grace.

F. B. Hole

Knowledge that has grown, silence that has not

Later generations can describe how the earth holds together far better than Job could. Describing is not the same as answering.

Present day knowledge can speak in detail about nebulae and the solar system, about attraction and the laws of gravitation. It can explain that the working together of these laws has given the earth its shape and its steady relation to the heavenly bodies. It can explain that the particles of the earth cling together by the laws of cohesion and chemical affinity. But law means a Law-giver. Who has established these laws? How do they act unfailingly? Revelation, and that alone, gives the answer — "By Him all things consist" (Col. 1:17). Where was Job, where was man, when the Lord established and set in motion these laws and principles? The form of the question met Job's knowledge at that time; it equally meets man's advanced knowledge at the present.

Samuel Ridout

Who held the line?

One writer hears in God's "who?" a hint of Someone else present at creation.

Who, Jehovah further asks, has laid down the measures of this great fabric and set His line upon it? The question suggests the possibility of another Presence. It points to One who was with Him, and who acted for Him in laying down and carrying out the whole vast plan. Who was this? "The Lord possessed Me in the beginning of His way, before His works of old… Before the mountains were settled, before the hills was I brought forth" (Prov. 8:22, 25). Or in the language of the New Testament, "All things were made by Him" (John 1:3).

Samuel Ridout

The kindness behind the cross-examination

The tone sounds crushing. The aim is not.

And yet Jehovah is not seeking to crush Job. He is seeking to bring him to a true knowledge of himself and of God… The very fact that Jehovah addresses Job in this way shows His purposes of mercy for him. His appeal is to reason, and so to conscience. He leads Job through the vast, and yet familiar, scenes of creation. Can he solve one of ten thousand of its riddles?

Samuel Ridout

Where the questions land

The questions do their work. By the end Job is not better informed; he is changed.

Though Job had heard something about the Lord, it was not enough to meet Job's actual need. Now the Lord brought him face to face with His own greatness and glory. The result was, "I abhor myself." It was not simply a matter of what he had done that he abhorred, but himself. This was the root of what he may have done, and God was dealing with that root: the pride of Job's very character. Every believer needs to be brought down to this very point.

Leslie M. Grant

Summary

- Reversal. Job demanded answers from God; God answers by asking, and the first question is one Job cannot touch.

- Silence. "Surely you know" asks for an answer Job cannot give. He knows only that God did it.

- Measure. The line and the measurements show a God who works by exact proportion, in creation and in His dealings of grace alike.

- Law-giver. Science can describe the laws that hold the earth together. It still cannot say who set them, so the question meets today's reader as it met Job.

- Mercy. The questions are not meant to crush, but to bring a man to know himself and God. They end not in information but in "I abhor myself."

Reviewed by Orion on September 12, 2026