[Isaac makes an affirmative noise, looking conflicted for a moment before finally abandoning the stretch of floor he was pacing over to go sit next to the other werewolf so that he can explain this properly. With the night he thinks they're about to have, he'll need all the assistance he can get.]

I guess it can be. Derek taught me on my second full moon- it's anything that means something to you. To the human side of you. [He presses a hand close to his chest, his jaw a little tight.] Derek's was his anger. It doesn't have to be an emotion, though. Just... something with enough weight to make you remember what you are. Something that drives you, I guess.