Help please!

Down below are two quotes from the picture of Dorian Gray by Oscar Wilde.

Explain these quotes and the effects of them.

"Innocent blood had been split. What could atone
for that? Ah! for that there was no atonement; but
though forgiveness was impossible, forgetfulness
was possible still, and he was determined to forget,
to stamp the thing out, to crush it as one would
crush the adder that had stung one" (Chapter 14).

"He winced at the memory of all that he had
teen suffered, and for a moment the same curious
feeling of loathing for Basil Hallward... came back
to him." - Any sign of hope for Dorian's soul dies
with Basil, shows no sign of repentance, or a
guilty conscience" (Chapter 16).