2 Corinthians 1:13

For we write no other things unto you, than what ye read or even acknowledge, and I hope ye will acknowledge unto the end.

Furthermore, there were no hidden things in his writings. If his enemies had perpetrated the slander that his writings were deceptive, or that he wrote one thing and meant another, this verse nailed their accusations as falsehoods. The very fact of Paul's answering them is proof that slanders were made.

Unto the end ... These words should be translated "fully," as thoroughly explained by Hughes.[17] The widespread error to the effect that Paul thought the end of the world was just around the corner probably lay at the base of the mistranslation. As Allo said:

Those who wish to understand this in an eschatological sense are not only misled by the mistaken idea that Paul and the Corinthians were expecting the end of the world as near at hand ... they also commit a serious error of literary judgment in failing to notice the intentional antithesis between KNOW and KNOW FULLY, as here, and as in 1 Corinthians 13:12.[18]

[17] Philip E. Hughes, op. cit., p. 27.

[18] E. B. Allo, Saint Paul: Seconde Epitre Aux Corinthiens (Paris, 1956), in loco.