Pastor Saul has a Problem
Saul had brooded over his disappointment, and cherished feelings of discontent at his own lot and of envy at the good of others to such an extent that his mind gave way before the diseased workings of his imagination. And so he lost all control over himself, and prophesied. The conjugation employed here (Hithpahel) is never used of real, true prophecy (which is always the Niphal), but of a bastard imitation of it. Really Saul was in a state of frenzy, unable to master himself, speaking words of which he knew not the meaning, and acting like a man possessed. In all this there was something akin to the powerful emotions which agitated the true prophet, only it was not a holy influence, but one springing from violent passions and a disturbed state of the mind.