capitalization in quotes?

if you quote the middle of a sentence do you still capitalize the first word in the quote.
for example, the sentence is, “Now that i have finished, the beauty of the dream vanished, and breathless horror and disgust filled my heart.” I want to say Victor claimed, “breathless horror and disgust filled my heart.” Do i capitalize breathless or not?
or do i say “.breathless horror and disgust filled my heart.”

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