Luke 9:39
A spirit seizes him and he suddenly screams; it throws him into convulsions so that he foams at the mouth. It scarcely ever leaves him and is destroying him — the detailed description of the possession (seizures, screaming, convulsions, foaming) communicates the severity and the duration. It scarcely ever leaves him and is destroying him: the ongoing, progressive destruction of the child by the demonic possession.