The words we speak have far more power than we imagine. In those words there is advice that touches the soul or a sharp sword that cuts the soul. Isn't it true that in the life we live, that statement is proven? There are many opportunities when the heart is hurt by the words spoken by others, or the soul is filled with joy because of comforting words that touch the soul.
In this reading, we see Job's response to the harsh words spoken by Bildad, his friend. The previous chapter showed Bildad's rebuke warning Job not to be like the wicked who would receive great retribution for their actions. Those harsh words did not describe the real reality that Job was going through, because Job insisted on being right before God. So in Job 19:1 Job loudly cried out, "How long will you hurt my heart and crush me with your words?" By saying those words, Job wanted to answer Bildad's question who always thought Job was stubborn by asking "how long?" Job emphasized that they had insulted him ten times and had no hesitation in torturing him. This sentence is to show that they had attacked and accused Job so often.
If Job had truly gone astray or deviated from God's path, then for him all the consequences he would face were part of his personal accountability to God. This was none of his friends' business and was not proof of the truth of all their opinions. Because that was exactly what they wanted to do, namely to make the misfortune suffered by Job as proof of Job's mistake and the truth of their argument. Their words were ultimately not merely an attempt to return Job to the right path, but rather proof of the truth of their statements.