But if anyone has caused sadness, he has not saddened me alone, but to some extent (not to exaggerate) he has saddened all of you as well.

As the truth of Christ is in me, this boasting of mine will not be stopped in the regions of Achaia.

For even if I wish to boast, I will not be a fool, for I would be telling the truth, but I refrain from this so that no one may regard me beyond what he sees in me or what he hears from me,

But he said to me, “My grace is enough for you, for my power is made perfect in weakness.” So then, I will boast most gladly about my weaknesses, so that the power of Christ may reside in me.