We continue to draw them even though we know that we will most probably end up crossing them at one point in time anyway. And when that happens, we know there's really no turning back. So we draw more lines, closer and closer, each having less meaning than the one that came before it. Until finally, we collide.
But unfortunately, there are some lines that are way too dangerous to be crossed. Because when we do, the only lines that we will end up knowing are the deep cuts left on our broken hearts.