{Confidence} (pepoith(8873)ei). This late word (LXX Philo,
Josephus) is condemned by the Atticists, but Paul uses it a half
dozen times ( 3:4  also). {I was minded to come} (eboulom(886e)
elthein). Imperfect, I was wishing to come, picturing his former
state of mind. {Before unto you} (proteron pros humas). This
was his former plan (proteron) while in Ephesus to go to Achaia
directly from Ephesus. This he confesses in verse  16  "and by
you to pass into Macedonia." {That ye might have a second
benefit} (hina deuteran charin sch(8874)e). Or second "joy" if we
accept charan with Westcott and Hort. This would be a real
second blessing (or joy) if they should have two visits from
Paul.