Again, think ye that we excuse ourselves unto you? For again the Latin version has "of old time." There are some among you who have for a long time thought that I have said so much as I have said as an excuse for my avarice and double-dealing, or that I craftily excuse myself and refuse your gifts, to induce you to give more.
We speak before God in Christ. We speak sincerely, truly, and without any reservation, as it is right for one to speak who professes to be in Christ, i.e, to be His disciple and member. Or "in Christ" may mean, with Christian sincerity, Christ being put for His attributes, the concrete for the abstract. Or, again, the sentence may mean: Before God we sincerely speak the truth, and I call Christ as my witness to my truth. As we say when taking an oath, "By God," or, "By Christ," so do the Hebrews say, "In God," or, "In Christ." So Vatablus takes it. Cf. also Rom. ix1. Anselm, however, understands "We speak in Christ" to mean, "According to Christ and His doctrine,...
After having answered one of their objections with regard to his disinterestedness, he thus proceeds: I perceive that of old, or for a long time, you have regarded this lengthened discourse merely as an apology to justify myself from the suspicion of avarice. But we speak before God in Christ; or, God is my witness that I have acted thus only for your edification. (Theodoret)
Seeking not the things that are yours, but yourselves, most willingly to spend our strength and life, and to be spent or completely exhausted for the sake of your souls.
Do you see how he is continually in fear, lest he should incur the suspicion of flattery? Do you see an Apostle's prudence, how constantly he mentions this? For he said before, We commend not ourselves again, but give you occasion to glory; 2 Corinthians 5:12 and in the commencement of the Epistle, Do we need letters of commendation? 2 Corinthians 3:1
But all things are for your edifying. Again he is soothing them. And he does not here either say clearly, 'on this account we receive not, because of your weakness;' but, 'in order that we may edify you;' speaking out indeed more clearly than he did before, and revealing that wherewith he travailed; but yet without severity. For he did not say, 'because of your weakness;' but, 'that you may be edified.'