17:7
Hushai states that Ahithophel’s advice was “not good this time”. So he acknowledges that Ahithophel usually gave sound advice. Hushai will then give his advice, and will use more flowery language than Ahithophel did, and will seek to appeal to Absalom’s ego.
17:8-10
Hushai starts by reminding Absalom what David and his men are like. They were all valiant men. Then, rather than focusing on their being tired and weary, Hushai says they will be angry and spoiling for the opportunity to get back what they considered to be theirs. Hushai also surmises that David will be hiding somewhere, such as in a cave. This would be consistent with his actions when on the run from Saul. Hushai then paints the picture of what would happen if David and his men mount a successful assault on Absalom’s men. This would be very bad for morale. The past reputation of David would be a telling factor.