Luke 8:28

This is not a voluntary confession, which merits a reward, but a forced acknowledgment, extorted against their wills. Like fugitive servants, who, when they meet their masters, think of nothing but of deprecating punishment. The devils think our Lord is come down upon earth to judge them. (St. Jerome) --- The torment from which this devil desires to be freed, is the pain and affliction he would suffer by being forced to yield to the power of Christ, in leaving the man; not the general torment of hell, to which he knew he was unchangeably and irrevocably condemned. He was also tormented with the fear, lest he should be now consigned to those eternal pains before his time, as it is expressed in St. Matthew. For, though the evil spirits are unavoidably condemned, and already suffer the chief torments of hell, yet the rigorous fulfilment of all is deferred to the day of judgment. (Jansenius, conc. Evang.)