| Barnes' Notes on the Bible I will speak, that I may be refreshed - Margin, "breathe." The meaning is, that he would then have room to breathe again; he would feel relieved.
Clarke's Commentary on the BibleI will open my lips and answer - In the preceding verse Elihu compares himself to a skin-bottle, in which the wine was in a state of fermentation, and the bottle ready to burst for want of vent. He carries on the metaphor in this verse: the bottle must be opened to save it from bursting; I will Open my mouth.
Gill's Exposition of the Entire BibleI will speak, that I may be refreshed,.... That his mind might be made easy; the matter it was full of lay with much weight upon it, pressed him hard, and gave him pain; and therefore he determines to speak his mind, and disburden himself: so a minister of the word speaks sometimes to the refreshment of others, the Gospel being a word in season to weary souls, bread to the hungry, drink to the thirsty, even wine to them that are of an heavy heart; and especially it is refreshing when the love of God is shed abroad in the heart through it, and the presence of God is enjoyed under it; and sometimes he speaks to the refreshment of himself with others, Romans 15:32; and whether it be so, one or the other, yet a faithful minister eases his mind, discharges his conscience, and is clear from the blood of all, when he truly and fully declares the whole counsel of God, so far as he is acquainted with it: I will open my lips and answer; speak freely and boldly what was upon his mind, and he had to say, and which he judged would be a sufficient answer to Job; the opening of his lips is a phrase used by him in allusion to the opening of a bottle, full of new wine, the metaphor before expressed by him.
Geneva Study BibleI will speak, that I may be refreshed: I will open my lips and answer.
King James Translators' Notesbe...: Heb. breathe
Jamieson-Fausset-Brown Bible Commentary20. refreshed-literally, "that there may be air to me" (1Sa 16:23).
Matthew Henry's Concise Commentary32:15-22 If we are sure that the Spirit of God suggested what we are about to say, still we ought to refrain, till it comes to our turn to speak. God is the God of order, not of confusion. It is great refreshment to a good man, to speak for the glory of the Lord, and to edify others. And the more we consider the majesty of God, as our Maker, and the more we dread his wrath and justice, the less shall we sinfully fear or flatter men. Could we set the wrath Lord always before us, in his mercies and his terrors, we should not be moved from doing our duty in whatever we are called to do. | 
