The law of karma is very scientific. The effects of our actions must be of the same nature and extent as the original actions themselves. It is not a question of reward and punishment but of energetics. Our actions set in motion a subtle force that pushes us along in life. If we act in a violent way towards others, for example, that violence becomes embedded in our psyche and reflects upon us, causing us to act and to be acted upon in a violent way. If we act in a loving and compassionate manner, on the other hand, that energy carries us along the stream of love and brings the forces of love into our life to the same degree and manner as the love we have put forth.