[There's a moment where he almost says "The only good templar is a dead one." In that moment, there's a tension between them. Maybe it's just his anger or his perception. Then he remembers Cassandra. He recalls what little he knows about the Seekers and their rites.

So he swallows back the words and offers her a polite half-bow.]

A dear friend of mine is a spirit. [Solas dissembles artfully; almost all his friends are spirits, but he's not going to tell a templar that in any circumstance.] One of our greatest fears was that he would be bound in service to our enemy. That fear has not left me. If you have bound a spirit, I would worry also for him, whether he is here or not or if he should come to be here.

[He pauses, briefly, and then adds with a surprising measure of sincerity:] Forgive me for my assumptions. Things are rarely as simple as they appear. If you are alive with a spirit inside you and have not been overcome, you are not the monster.