3 Gird up now thy loins like a man; for I will demand of thee, and answer  thou me.
3 Brace yourself like a man; I will question you, and you shall answer me.
3 Dress for action
3 Pull yourself together, Job! Up on your feet! Stand tall! I have some questions for you, and I want some straight answers.
3 Now prepare yourself like a man; I will question you, and you shall answer Me.
3 Brace yourself like a man, because I have some questions for you, and you must answer them.
Matthew Henry's Commentary on Job 38:3
Commentary on Job 38:1-3
(Read Job 38:1-3)
Job had silenced, but had not convinced his friends. Elihu had silenced Job, but had not brought him to admit his guilt before God. It pleased the Lord to interpose. The Lord, in this discourse, humbles Job, and brings him to repent of his passionate expressions concerning God's providential dealings with him; and this he does, by calling upon Job to compare God's being from everlasting to everlasting, with his own time; God's knowledge of all things, with his own ignorance; and God's almighty power, with his own weakness. Our darkening the counsels of God's wisdom with our folly, is a great provocation to God. Humble faith and sincere obedience see farthest and best into the will of the Lord.