12:19Meaning
Purpose stated—speaking before God for their upbuilding Paul challenges the idea that he has been making excuses to the Corinthians. He frames his speech as happening with God as witness and “in Christ,” meaning he understands his words as accountable to God and bound up with his relationship to Christ. He then addresses them warmly (“beloved”) and states the positive aim: everything he is doing is meant to build them up, not to win a personal case.
