What is the Cause, or why do people misquote Bible verses like 1 Timothy 6:10?

It strikes me recently just how many people will say that "Money is the root of all evil." when the actual Bible verse is... "A love of money is the root of all evil." I wonder why people say that and what is the ***cause*** of this most often misquoting of this Bible verse. Not only do people "misquote" Bible verses, but often attribute sayings to the Bible that were never there, but found in only cultural folklore or perhaps used in some sermon or hymn of Christianity. Why is there this tendency? What is the ***discernable cause*** for such a tendency?