Do you believe in the karmic principle that what you do today will have an effect on your next life? That's the belief of Hindus and Buddhists, I guess. But for Christians, our interpretation of the karmic law is that what you do today will have an effect on you tomorrow. So that is what the Bible said - what you sow, you reap. But there are times that no matter what goodness we do, failures and misfortunes still hit us. That gives credence to the Buddhist's concept of karma that our life now is greatly influenced by our past life.