Thomas has a craziness about him. A defrocked minister, he is a virtual outcast from the COMMUNITY. While penitent for his many sins, he has a strong belief that God speaks through him. But being penniless, he has no food, lodging or even shoes.
His thoughts were psyche-scanned before the beginning of the story. The ESP officers wonder if they were a coded message because his words were in rhyme. So he becomes a suspect because of an accidental capture of his thinking processes.
Strictly speaking, Thomas believes in Christ’s Second Coming. He has studied his Bible religiously for most of his life. He can quote chapter and verse of great swathes of scripture and he studied Hebrew and Greek in seminary. And he thinks the Devil is out to get him.
(He is the one being crucified.)