Job 38:5

Who hath laid the measures thereof, if thou knowest? or who hath stretched the line upon it?

Ver. 5. Who hath laid the measures thereof] In that circumference and diameter that it holdeth?

If thou knowest] Or, For thou knowest; quandoquidem scitus es, a tart irony. Geometricians take upon them to know the various dimensions of the earth; and Archimedes boasted, that if he had but where to set his foot from off the earth he could shake the whole body of it. As also, that he could number all the sands that were in the whole world, habitable and inhabitable. But these were vain boasts.

Or who hath stretched the line upon it?] A metaphor from masons and other master builders, who work by line and by rule. Vitruvius in his 7th book saith thus, Longitudines ad regulam et lineam, altitudines ad perpendiculum, anguli ad normam respondentes exigantur.