Any sophomore student of human nature will tell you people say stuff they don't mean and think stuff they don't say, and uncovering these unspoken truths can change the way you feel about the words coming out of their mouths.
For instance, you know that friend or relative who is constantly claiming they just say the hateful stuff everyone else is thinking but are "too afraid to say"?
They're really just trying to absolve themselves of any blame or anger related to the ugly words spewing out of their mouths, so don't let them off the hook when they pass the blame off to some unknown "everyone".
And when someone says a decision is "up to you" even though they've clearly stated their stance on the issue you'd better rack your brain and remember how they felt- or you'll be hearing about your bad decision for years to come!
See 29 B.S. Things People Say (And What They Actually Mean) at Cracked (barely NSFW due to language)