Benjamin has imagined multiple scenarios of himself being captured by the church.
It might be when he was meditating in his room when the bishop suddenly shows up and shines the holy light on his face; or it might be when he was walking around the streets in the outskirts when a group of people would suddenly rush out with their horses and capture him...
Benjamin understood the risk that came with his identity as a mage. The church could see through his lies at any moment. That was why he had mentally prepared himself for the day when he would finally clash with the church.
He could not possibly continue practicing magic under the eyes of the church forever.
What Benjamin did not imagine was the reason why he was currently being arrested by the church. Since the beginning, the church never did realize Benjamin’s identity as a mage, but now, he was assumed to be Grant by everyone just because of Mary. Benjamin was baffled by the predicament he was in.