Temple of the Golden Pavilion chapter 10

I don't really understand why Mizoguchi bought the arsenic pills and the knife. Perhaps the two items were planned evidence to leave at the crime to make it seem as though Mizoguchi was suicidal. It is a perfect convenience when the fire alarm breaks and the repairman doesn't come for several days because it allows Mizoguchi time to execute his plan. Mizoguchi finally feels as though someone has understood him when he speaks to Father Zenkai because Father Zenkai believes that it doesn't matter what kind of acts a person does or who the person chooses to be because all life eventually ends anyhow. When Mizoguchi is by the pond looking at the temple it seems as though he is evaluating its structure, seeing a view of the temple which he had never noticed before. The whole scene where Mizoguchi is viewing the temple and preparing to burn it is very saddening because he is about to destroy something that is so beautiful because it is so full of history and culture. I thought that perhaps Mizoguchi was going to perish in the flames because he could not get the door open in the temple. Once he sets fire to the temple and gets away he is free and he is ready to live life in a way that he never could before. Perhaps this is because he no longer has to become something he did not want to be and or because he no longer has the Golden temple to rule over him.