The words of Elihu struck as arrogant. The younger man is presuming to teach his elders. And he ends with "Let us discern for ourselves what is right; let us learn together what is good."
So here we have a young man determining what is good, and by inference what is evil. It seemed to me an echo of the conversation in the Garden of Eden between Satan and Eve. "You will be like God, knowing good and evil."
Man's intellect falls short of understanding God. He is too big for us to wrap our tiny little minds around. We cannot see the eternal ramifications of our actions. God has no such limitations. We are better served to listen to His teachings on good and evil rather than to make up our own minds on a case by case basis.
My grandmother used to say "when God wants to let you know how small you are, He gives you your own way." The implication being that He also lets you reap the fuit of your selfishness - because most of our desires are naturally selfish.
God has a plan for each of us. We are well advised to ask Him for the itinerary of our lives.
Help us not to be so caught up with our own thinking that we have no room to listen to You. Keep us seeking You and Your will first in our lives that we might know what You say is good and do it.
In Jesus' most precious name.