What does "glittered when he walks" suggest in Edwin Arlington Robinson's poem "Richard Cory"?
To say that Richard Cory "glittered when he walked" and "fluttered pulses" when he spoke even the simplest and most mundane words shows how he is idealized by those around him. He is described as imperial and compared to "a king" who possesses "every grace." Everyone around him thinks that his life is enviable in every conceivable way. Even in the line "he was a gentleman from sole to crown," the word "crown" is used to describe the top of his head (as if to say he is every inch the gentleman), but the association of a crown with royalty cannot be overlooked. He seems to everyone else the epitome of grace and good fortune. In reality, however, the way Richard Cory viewed his life was obviously very different, because he chose to end it in such a catastrophic and violent way.
The line "he glittered when he walked" shows the great disparity that can exist between the way others perceive us and the way we feel about ourselves. We never know when we look at someone what they might be feeling underneath whatever facade they display. Someone might think that we have it all together, that we lead a charmed life, but they can never know how we truly feel, how we truly are.
The line "...he glittered when he walked" suggests the perspective that the common people think of Richard Cory as an almost celestial being—certainly, one much above them in social position.
Just as people nowadays speak of great athletes, famous actors and actresses, and others who are above the norm as "stars," the people who suffer during the Panic of 1893, a serious economic depression, perceive Richard Cory as a being who is untouched by the vicissitudes of their lives.
Of course, the irony in this poem is that although Richard Cory is wealthy and does not have to go "without the meat," the "people on the pavement" (the ordinary people) feel intimidated by his high station and, therefore no one engages with him or even considers why he comes to town and speaks to people. In reality, Richard Cory, "who is always human when he talked," would probably like to have some interaction with people. So, in his terrible loneliness, Richard Cory despairs and puts a bullet into his head.