2. renounced—literally, "bid farewell to."
of dishonesty—rather, "of shame." "I am not ashamed of the Gospel of Christ" (Ro 1:16). Shame would lead to hiding (2Co 4:3); whereas "we use great plainness of speech" (2Co 3:12); "by manifestation of the truth." Compare 2Co 3:3, "manifestly declared." He refers to the disingenuous artifices of "many" teachers at Corinth (2Co 2:17; 3:1; 11:13-15).
handling … deceitfully—so "corrupt" or adulterate "the word of God" (2Co 2:17; compare 1Th 2:3, 4).
commending—recommending ourselves: recurring to 2Co 3:1.
to—to the verdict of.
every man's conscience—(2Co 5:11). Not to men's carnal judgment, as those alluded to (2Co 3:1).
in the sight of God—(2Co 2:17; Ga 1:10).