Deck thyself now with majesty and excellency - That is, such as God has. Put on everything which you can, which would indicate rank, wealth, power, and see whether it could all be compared with the majesty of God; compare Psalms 104:1, “O Lord my God, thou art very great; thou art clothed with honor and majesty.”
Related Commentaries of Job 40:10
Job 40:10
10 Deck thyself now with majesty and excellency; and array thyself with glory and beauty.