I want to be like the man on the subway who told the operator about the woman's seizure, because as soon as he did, people followed suit and offered help. We have the power to choose whether to justify passivity or actively decide to do the right thing, and as a society I believe we ought to break free from our psychological tendency to just stand by.
I don't think selfishness comes naturally. I believe it develops over time through socialization and, in all honesty, it doesn't make you a good person just because you donate to a charity (looking at you stuck up rich people). Similarly, it doesn't make you a bad person just because you passed up a volunteer opportunity (more of a note for myself).
When people say Christmas is a "state of mind" this is what they mean. It's that easy-going, love-thy-neighbor, tip-more-generously, forgive-a-little-deeper, smile-for-no-reason, kind of season. That's what the spirit of Christmas is and what goes along with it is music. It's the magical combo: Christmas music + Traffic = Tolerable.