he is conceited, knowing nothing, but obsessed with arguments, disputes, and word battles, from which come envy, strife, reviling, evil suspicions,
Evil surmisings - Suspicions that they are led to hold their views, not by the love of the truth, but from sordid or worldly motives. Such suspicions are very apt to attend an angry debate of any kind. It might be expected especially to exist on such a question as the apostle refers to here - the relation of a master and a slave. It is always very hard to do justice to the motives of one who seems to us to be living in sin, or to believe it to be possible that he acts from right motives.