If you look at 'Famous Quotes' sites (there are a lot of them on the net), you will find a lot of inauthentic quotes attributed to the Buddha. Anything that anyone isn't sure about is given his name if it sounds vaguely Eastern/mystical, is labelled 'the Bible' if it sounds Christian and old, 'Shakespeare' if non-religious and old, 'Oscar Wilde' or 'George Bernard Shaw' if it's witty and not obviously modern.
There's a lot of rubbish out there ... best to stick to reputable sources.
If you have a suspect quote which you nevertheless like, enter a chunk of it (e.g."If anyone thinks that the mesh of a net is an independent, isolated thing, he is mistaken") in your search field. If all the hits are rubbish sites, mentally label it 'anonymous'. If you get ATI or similar, you've found the source.