Job 32:18

He wants to show that he suffered for a long time and waited to speak and that he contained himself and could burst. Therefore, he needed a large amount of patience. To be able to control one's words is the greatest proof of wisdom, and [Elihu's] ardor for God has enabled him to bear such an interior fire.

I am full of words, the spirit of my womb constraineth me. Behold, my belly is as new wine without a vent, which bursts in sunder new vessels. I will speak, and will take breath awhile; I will open my lips and answer. When boastful men observe that holy preachers speak eloquently, and are reverenced for their eloquence, they frequently imitate the loftiness of their language, and not their useful intention. They are far from loving what the others desire, but are especially anxious to gain great renown amongst men. For it is frequently the case that wise men, when they find that they are not listened to, impose silence on their lips. But frequently when they see that the sins of the ungodly gain strength when they are silent, and cease to reprove, they endure a kind of violence in their spirit, so that they burst forth in language of open reproof. And hence when the Prophet Jeremiah had imposed on himself silence in preaching, saying, I will not make mention of Him, nor speak any more in His Name; he immediately added, And there was made as it were a burning fire in my bosom, and shut up in my bones: and I was wearied, not being able to bear it; for I have heard the insults of many. For, seeing that he was not listened to, he wished to hold his peace; but when he beheld evil increasing, he no longer persisted in the same silence. For when he ceased to speak without, from being wearied of speaking, he felt a flame kindled within him by the zeal of charity. For the hearts of the just burn within them, when they behold the deeds of the ungodly gain strength from not being reproved, and they believe that they are themselves partakers in the guilt of those, whom they allow, by their own silence, to go on in iniquity. The prophet David, after he had imposed silence on himself, saying, I have set a guard upon my mouth, while the sinner stood against me. I was dumb, and was humbled, and kept silence even from good things: in the midst of his silence blazed forth with this zeal of charity, when he immediately subjoined; My sorrow was renewed, my heart grew hot within me, and in my meditation a fire shall flame out. His heart grew hot within him, because the flame of charity refused to burst forth in words of admonition. The fire burned in the meditation of his heart, because his reproof of the ungodly had ceased to flow on with the chiding of his lips. For the zeal…