25 He dared too to say that he was the Paraclete, though it is written, But whosoever shall blaspheme against the Holy Ghost, has no forgiveness. He committed blasphemy therefore by saying that he was the Holy Ghost: let him that communicates with those heretics see with whom he is enrolling himself. The slave shook the world, since by three things the earth is shaken, and the fourth it cannot bear—if a slave became a king. Having come into public he now began to promise things above man's power.
The son of the King of the Persians was sick, and a multitude of physicians were in attendance: but Manes promised, as if he were a godly man, to cure him by prayer. With the departure of the physicians, the life of the child departed: and the man's impiety was detected. So the would-be philosopher was a prisoner, being cast into prison not for reproving the king in the cause of truth, not for destroying the idols, but for promising to save and lying, or rather, if the truth must be told, for committing murder. For the child who might have been saved by medical treatment, was murdered by this man's driving away the physicians, and killing him by want of treatment.
Source: Catechetical Lectures (New Advent)