Garfield is implying that he is perfect already; Nermal is implying the opposite, and is probably about to humorously point out Garfield’s flaws, which Garfield has just left himself open to.
Hey GoComics, here’s an idea: feature the actual comic. There are numerous other sites that actually have the right one. This is the seventh in a row. It’s not that hard.
Garfield is implying that he is perfect already; Nermal is implying the opposite, and is probably about to humorously point out Garfield’s flaws, which Garfield has just left himself open to.