"he became enthused with how the preacher was explaining" (S87)

he became enthused with how the preacher was explaining the mysteries of the Christian religion. The preacher was explaining how the rapture will occur. Jesse paid all his attention to the preacher. This went on, for it was a long sermon. Two hours have passed, and Jesus could not resist his sudden interest in eschatology and how the world will come to an end.
He was filled with emotions, and suddenly tears, not of joy, but of sorrow, filled his heart and eyes.

Eventually, the video got to the point that Jesse forgot that he was warming a dessert in the oven.
It got burnt, and before he could say jack, his mother was furious about his actions.

Some days, he became ascetic, despairing all for a heavenly vision. His zeal and religious affection became immense that he would not even step on an ant to lose his reward in the future, terrestrial kingdom.
Day-to-day, he was in the temple, evangelising and inviting others to join him to be citizens of heaven.

His quest to know more about the kingdom of heaven landed his in life that he left the 'evil' world', as he called, to an enclave that no one passed.
Jesse within 20 years, had made about 200 converts. A deadly disease which broke out in their monastery killed them all, because they thought that taking medication was a sin.