By way of disparagement (κατα ατιμιαν). Intense irony. Cf. 2. Corinthians 6:8.

As though (ως οτ). Presented as the charge of another. "They more than tolerate those who trample on them while they criticize as 'weak' one who shows them great consideration" (Plummer). After these prolonged explanations Paul "changes his tone from irony to direct and masterful assertion" (Bernard).

I am bold also (τολμω καγω). Real courage. Cf. 2. Corinthians 10:2; 2. Corinthians 10:12.