In biology, an organism behaves altruistically when its behavior benefits other organisms, at a cost to itself.
Altruism is an attitude, a choice, done with a smile and goodness in the soul. Simply done with no hidden agenda. Altruism is self-sacrifice for the benefit of another, going the extra mile to be kind to someone else without a thought to personal gain. Recently, it seems like our actions are all determined by selfishness. Altruism is not a job, a chore, or something that has to be done so we seem to not do it. Let this be a wake-up call to carry out an act of kindness no matter how big or small, the next chance you get. Inner peace and serenity is the reward.