2 Corinthians 10:2

Yea, I beseech you that I may not when present show courage with the confidence wherewith I count to be bold against some, who count of us as if we walked after the flesh.

The thought in this is that Paul was purposely mild and timid when present with the whole congregation, and that he was beseeching the majority of them, even here, that they would not be offended by that confident courage he was prepared to demonstrate against the "some," not only in what he was about to write, but also when he would soon appear among them personally. There is no admission on Paul's part here that there was anything "weak" about his personal appearance. The whole theory of these later chapters "blasting the whole congregation" is nullified by the distinction between the "you" which included the whole congregation and the "some" which referred to the false teachers.