How should I style paragraphs in a block quotation?
In a block quotation that includes more than one paragraph, indent the beginning of the paragraphs after the first one, even if your source uses line spaces instead of indentation to indicate paragraph breaks. Do not, however, indent the first line of the first paragraph in the block quotation, even if it is the start of a new paragraph in your source. Section 1.3.2 of the MLA Handbook offers further guidelines on styling material quoted from prose sources.
MLA Handbook. 8th ed., Modern Language Association of America, 2016.