Job 32:1-32
So these three men stopped answering Job, because he was righteous in his own eyes. But Elihu son of Barakel the Buzite, of the family of Ram, became very angry with Job for justifying himself rather than God. He was also angry with the three friends, because they had found no way to refute Job, and yet had condemned him
So Elihu son of Barakel the Buzite said:
I gave you my full attention. But not one of you has proved Job wrong; none of you has answered his arguments. Do not say, ‘We have found wisdom; let God, not a man, refute him.’ But Job has not marshaled his words against me, and I will not answer him with your arguments.
It is not only the old who are wise, not only the aged who understand what is right.
For I am full of words, and the spirit within me compels me; inside I am like bottled-up wine, like new wineskins ready to burst. I must speak and find relief; I must open my lips and reply. I will show no partiality, nor will I flatter anyone; for if I were skilled in flattery, my Maker would soon take me away.
Why?
Elihu kept silent for he is younger than the other three friends. Elihu felt Job was righteous in his own eyes so Elihu was angry that Job and these three friends couldn't say the right words.
How?
The old doesn't mean who are wise, no only the aged understand what is right. But younger isn't wise either.