The Judge, according to the Doctrine, was the one who could fully judge one. They knew the judged's thoughts and their feelings. The 19th Sermon of Priest Saha said it best:
The Judge would come, and not a single thing should be hidden from them. One's mind, one's sins, one's virtues would be a like a book in the square. Their feelings, emotions, passions would be like the wind and the rain to him, from the softest breeze of love to the burning sun of anger. They could feel it.
[Luce knew while he fit that, the Church also told him he wasn't.]
Action | Luce tries his best not to
The Judge would come, and not a single thing should be hidden from them. One's mind, one's sins, one's virtues would be a like a book in the square. Their feelings, emotions, passions would be like the wind and the rain to him, from the softest breeze of love to the burning sun of anger. They could feel it.
[Luce knew while he fit that, the Church also told him he wasn't.]