They have just had this discussion. He can't stop there being more Jedi, and they will form an order because the light will still be there.

It wasn't worth an argument, it was such a foregone conclusion to him.

He waved one hand, vaguely, at mention of his death. "I'll be dead in a matter of weeks." It made no difference. "And good. Then I know exactly how you can get very close to the Emperor."