Job 40:14

Save - Except; besides.

Thine own right hand can save thee - It is the prerogative of God alone to save the human soul. Nothing less than unlimited power, exerted under the direction and impulse of unbounded mercy, can save a sinner. This is most clearly asserted in this speech of Jehovah: When thou canst extend an arm like God, i.e., an uncontrollable power - when thou canst arm thyself with the lightning of heaven, and thunder with a voice like God - when thou canst deck thyself with the ineffable glory, beauty, and splendor of the supreme majesty of Jehovah - when thou canst dispense thy judgments over all the earth, to abase the proud, and tread down the wicked - when thou canst as having the keys of hell and death, blend the high and the low in the dust together; then I will acknowledge to thee that thy own right hand can save thee. In other words: Salvation belongeth unto the Lord; no man can save his own soul by works of righteousness which he has done, is doing, or can possibly do, to all eternity. Without Jesus every human spirit must have perished everlastingly. Glory be to God for his unspeakable gift!

Then will I also confess unto thee ... - If you can do all this, it will be full proof that you can save yourself, and that you do not need the divine interposition. If he could do all this, then it might be admitted that he was qualified to pronounce a judgment on the divine counsels and dealings. He would then show that he had qualifications for conducting the affairs of the universe.