The man whom thou seekest - namely, David. Ahithophel means to say: "If I can only smite David, there will be no civil war, all the people will peaceably submit."

The man whom thou seekest is as if all returned - Only secure David, and all Israel will be on thy side. He is the soul of the whole; destroy him, and all the rest will submit.

And I will bring back all the people unto thee,.... Meaning not the people only that were with David, that he would make them prisoners, and bring them with him; for he before proposed to let them make their escape; but to reduce all Israel to the obedience of Absalom at once, by executing this scheme which he had formed:

the man whom thou seekest is as if all returned; meaning David, whom he speaks of contemptibly, and whose life it seems Absalom sought, as well as his crown; and he being dead, it would be all over at once with the people; they would immediately return to their own habitations, and yield obedience to Absalom as the rightful heir and successor; all depended on his death, he intimates: from whence it appears that Abarbinel is wrong in suggesting that Absalom did not design to take away the life of his father, only to secure the kingdom to himself in his father's lifetime, who he understood had disposed of it by his will to Solomon; but here Ahithophel plainly declares the intention of Absalom, nor would he have proposed in plain terms to take away the king's life, had Absalom been averse to it; and it is plain by what follows that the thing was pleasing to him:

so all the people shall be in peace; both parties coalesce under the government of Absalom, and live peaceably under it, and so an entire end of the war.

And I will bring back all the people unto thee: {b} the man whom thou seekest is as if all returned: so all the people shall be in peace.

(b) Meaning David.

17:1-21 Here was a wonderful effect of Divine Providence blinding Absalom's mind and influencing his heart, that he could not rest in Ahithophel's counsel, and that he should desire Hushai's advice. But there is no contending with that God who can arm a man against himself, and destroy him by his own mistakes and passions. Ahithophel's former counsel was followed, for God intended to correct David; but his latter counsel was not followed, for God meant not to destroy him. He can overrule all counsels. Whatever wisdom or help any man employs or affords, the success is from God alone, who will not let his people perish.