Jeff Buckley wrote a song called grace, (part of) it goes something like this "Rain in the fire, rain in the fire" its rad. Basically thats what grace is. We all know that we screw up. Everyone screws up. Some know they're screwed up, others just don't think about it for any number of reasons (they simply don't think about what they do or their character, or are just focussed on other stuff, like cash or women (or men), or whatever). Thats what grace is, thats what the death of Jesus bought, rain in the fire to all mankind.