Tears before bedtime

I was sitting quietly working on my thesis just now, with a randomized playlist providing background noise. For absolutely no reason, the Renaud song Mistral gagnant made me cry. I'm not upset tearful, I don't think, it's more like a sudden sense of how much certain people mean to me.

I don't understand this at all; I have absolutely no associations with the song and it's not especially lovely, kind of sentimental but not the sort of thing I normally find deeply moving. And it's not a time of the month when I should be randomly tearful about nothing, and no emotionally disturbing things have happened to me recently.

Te raconter enfin qu'il faut aimer la vie / Et l'aimer même si le temps est assassin...

(Lemme tell you, you gotta love life in the end, you gotta love it even when time comes to murder it.)