John Gill Commentary Job 40:11

"Pour forth the overflowings of thine anger; And look upon every one that is proud, and abase him." — Job 40:11 (ASV)

Cast abroad the rage of your wrath
Work yourself up into a passion, at least seemingly; put on all the airs of a wrathful and enraged king on a throne of state, whose wrath is like the roaring of a lion, and as messengers of death; pour out menaces plentifully, threatening what you will do; and try if by such means you can humble the spirit of a proud man, as follows;

and behold everyone [that is] proud, and abase him ;
look sternly at him, put on a fierce, furious, and menacing countenance, and see if you can dash a proud man out of countenance, and humble him before you, as I am able; among the many instances of divine power the Lord settles upon this one, and proposes it to Job to try his skill and power upon, the humbling of a proud man.