Final answer:
The block quotation lacks proper indentation, is incorrectly inline with the text, misquotes the author's last name, and the parenthetical citation is not formatted correctly according to MLA guidelines.
Step-by-step explanation:
Concerning the formatting of the block quotation from Frankenstein, a couple of errors can be pinpointed when adhering to MLA formatting standards. Block quotations should be formatted as free-standing blocks of text starting on a new line, indented 0.5 inches from the left margin, without quotation marks. The parenthetical citation should be outside the punctuation, with the period following the citation. For the passage provided, it is improperly inline with the rest of the text and lacks indentation. Moreover, the citation at the end ('Shelly 25') incorrectly spells the author's last name which is 'Shelley' and should include the first name if it's the first citation of the source. Here is how it should be correctly formatted:
Early in his letters, Robert Walton describes Frankenstein as a man of contradictions:
"Even broken in spirit as he is, no one can feel more deeply than he does the beautifies of nature. The starry sky, the sea, and every sight afforded by these wonderful regions, seem still to have the power of elevating his soul from earth. Such a man has a double existence: he may suffer overwhelmed by disappointments; yet, when he has retired into himself, he will be like a celestial spirit that has a halo around him, within whose circle no grief or folly ventures."
(Shelley 25)
Note that the proper citation lists the full name 'Mary Shelley' in this instance, as the formatting indicates it's the first reference. If it were a subsequent citation, only the last name 'Shelley' would be necessary.