When you are a Hunter there are Two States of Being

Sam died saving Dean's life. With everyone they love dead, Cas and Dean hunt together. One night, while Dean and Cas sit on the impala hood after a hunt, Cas asks Dean what it means to be a hunter. Dean is silent for a long time, so long Cas thinks he may be asleep. But then Dean speaks: "when you are a hunter there are two states of being…" With each word Cas' heart breaks.