Gregor always has the best intentions, but he fails to communicate them effectively, and always makes blunders that increase his family's difficulties. The most heart-wrenching example of a well-intentioned, failed gesture comes during Grete's violin concert for the boarders. Gregor wants to prove that he's not a mere animal, and feels that the music will offer him the "unknown nourishment" he's lacking (which suggests that a lack of art and beauty contribute to his death, shortly after the concert). He creeps forward in a fit of optimism and affection, but of course his actions ruin the concert and destroy his family's attempt to make money. In this situation and in the many other moments of failed good intentions, Gregor's problem is his inability to communicate. Even without talking, he ought to be able to use body language to show what he intends, but his insect-like brain prevents him from acting in an understandable way.
This theme demonstrates the extreme importance of effective communication, as well as the way that people's preconceptions and opinions create walls. To take another example, Gregor's father's certainty that Gregor's scuttling is threatening, not just nervous, leads him to attack his son.
Intentions vs. Outcomes ThemeTracker
Intentions vs. Outcomes Quotes in The Metamorphosis
You amaze me, you amaze me. I thought you were a quiet, dependable person, and now all at once you seem bent on making a disgraceful exhibition of yourself.
Was he an animal, that music had such an effect on him?