Karma means your actions and deeds. Whatever kind of actions you do, you will be treated accordingly by God. As you sow, so shall you reap is the central theme of the Karma theory. If you sow goodness, you will reap goodness and if you indulge in all sorts of evil activities, you will be definitely punished by God. People believe that God does not make us happy or sad as per his wish or without some reason. God is fair and gives us what we deserve.
The karma theory revolves around the totality of human actions and their concomitant response in this life and the previous ones, goes a long way in deciding the future. You can win over karma by acting intelligent and showing dispassionate response towards things.
So, do good deeds and don’t indulge in evil activities. Give your best to the world to get the best back from it. According to Chanakya, “A man is born alone and dies alone; and he experiences the good and bad consequences of his karma alone; and he goes alone to hell or the Supreme abode.”