In the end of the day only three types of behavior exist, one is goodness and compassion; the other is selfishness, which is what we are born into, namely instinctual loves and fear (i.e. pleasure and staying away from pain, as well as we are social creatures, amongst many other instincts) and unfortunately, the last is the desire to harm others, when we are jealous of them (but as the mind rationalizes desires, a person can ever understand himself, so if your actions fall into one of the above three categories, that is your motivation!)