The chapter where Sorweel descends into the Holy Deep is pretty unassailable. I admit Bakker really got me for a second with the mention of Sorweel being torn in two, but I managed to gather the true meaning quickly enough.
I'd say the final chapter from Koringhus got me the most. Most of the time, character arcs in this series seem to be a downward trend, here this was almost redemptive and moving, even if it did end with him killing himself. Maybe I completely missed the real implications, but it seems to me the Survivor really did love that child, or at least as much as a Dunyain could.