The roof of a house is its highest point, and the part most exposed to the sun. So it makes sense that in the Bible, “roof” represents what is inmost in a person -- the part that is closest and most in contact with the Lord. This inmost part is, in everyone, a love or affection rather than a truth or idea. This makes sense if you think about it: Even the greatest thinkers are driven by a love of ideas -- our character is ultimately a matter of what we care about, not what we think. Following this, then, “roof” represents our most deeply felt affection for what is good and true.