Breaks and Faith

Why is it that i can feel completely and utterly safe in my vehicle until the man mentions that i might want to replace my breaks sometime in the not so distant future? I have been driving without knowledge of said problem (and is it really a huge problem when i haven't felt or heard them?) with no issue or fear. All it takes is a few words. This, of course, doesn't hold much bearing anymore seeing as i haven't fixed them yet (it'll happen, it'll happen) and i apparently have no issue driving my car. Okay, so occasionally when i hit the breaks i wonder, but it doesn't happen every time. just sayin'