How can I convince Tallum to leave?

Hint 1 of 8:

This conversation takes place in the Chapel after you have met Jack.

Hint 2 of 8:

Step directly in front of Tallum, facing the altar, so you can escape easily
if you say the wrong thing.

Hint 3 of 8:

If you say something wrong, he will attack.  Back up quickly and run for the
nearest exit.

Hint 4 of 8:

There is a way to convince him to leave.