en_tn/job/09/01.md

I truly know that this is so

Here the word "this" refers to Bildad's description.

But how can a person be in the right with God?

"How can anyone win an argument with God?"

If he wants to argue with God, he cannot answer Him once in a thousand times

"If anyone wants to argue with God, he would be unable to answer even one of God's questions."

to argue

"to dispute"