What does 2 Samuel 14:18 mean?

Now therefore seeing that I have come to speak this word to my lord the king, it is because the people have made me afraid. Your servant said, ‘I will now speak to the king; it may be that the king will perform the request of his servant.’

For the king will hear, to deliver his servant out of the hand of the man who would destroy me and my son together out of the inheritance of God.

Then your servant said, ‘Please let the word of my lord the king bring rest; for as an angel of God, so is my lord the king to discern good and bad. May Yahweh, your God, be with you.’”

The king said, “Is the hand of Joab with you in all this?” The woman answered, “As your soul lives, my lord the king, no one can turn to the right hand or to the left from anything that my lord the king has spoken; for your servant Joab urged me, and he put all these words in the mouth of your servant;

to change the face of the matter has your servant Joab done this thing. My lord is wise, according to the wisdom of an angel of God, to know all things that are in the earth.”

The king said to Joab, “Behold now, I have done this thing. Go therefore, and bring the young man Absalom back.”