6 He must not be a recent convert, or he may become conceited and fall under the same judgment as the devil.

Read 1 Timothy 3:6 Using Other Translations

Not a novice, lest being lifted up with pride he fall into the condemnation of the devil.
He must not be a recent convert, or he may become puffed up with conceit and fall into the condemnation of the devil.
An elder must not be a new believer, because he might become proud, and the devil would cause him to fall.