A very short Sazed chapter. Mostly, this was just here because I had to remind the readers that Sazed was doing things. Getting to the Conventical is going to take enough time that, if I hadn't thrown in a small chapter like this, you would have gone a long time without seeing Sazed.
The things he mulls over here, then, are reinforcement of his character and his conflicts. It's also helping establish Marsh. Not because of what is said, but simply because you see them both again, and are therefore reminded of the things I talked about last time I was with him.
I wrote Mistborn One mostly chronologically, regardless of viewpoint. I did that with this book for the most part too, but I did write a lot of these Sazed chapters together, in bulk, so that I could keep the tone and voice right. I knew how many chapters from his viewpoint I needed, and I knew where they had to go, so I divided up what needed to happen and went from there.