How does Fyodor Dostoevsky use imagery in Notes from the Underground?

Imagery:

"It was sheer torture, a continuous intolerable sense of humiliation at the idea, which turned out to be a constant and direct feeling, that I was nothing but a fly before all that fine society, a revolting, obscene fly - more intelligent, more cultivated, nobler than anyone else, that went without saying, but a fly nonetheless, forever yielding the way to everyone, humiliated and insulted by everyone."