If you ever want a solid source for quotes, Wikipedia has an underserved sister project called Wikiquote. I’m unfamiliar with details like their inclusion criteria (if those exist), but what I can tell you is that pages have a section for quotes by the subject and – if they’re sufficiently discussed – another for quotes about the subject.
The quotes by the subject can be divided into three subsections: real quotes, ones considered “disputed”, and ones considered “misattributed”, all of which are sourced.
If you ever want a solid source for quotes, Wikipedia has an underserved sister project called Wikiquote. I’m unfamiliar with details like their inclusion criteria (if those exist), but what I can tell you is that pages have a section for quotes by the subject and – if they’re sufficiently discussed – another for quotes about the subject.
The quotes by the subject can be divided into three subsections: real quotes, ones considered “disputed”, and ones considered “misattributed”, all of which are sourced.
It’s how I confirmed and sourced this quote.