The term 'Karma' originated from Vedic Sanskrit. It means an executed deed that initiates the cycle of cause and effect, where this 'karma' is affected by the intention of the individual and it influences his future. The concept of Karma has evolved over centuries in the epics of Hindu religion, where it indicates that a man reaps what he sows. According to this concept, nobody can inherit the the good or evil acts of others, they just face the effects of their deeds and their reaction to those effects, brings in another set of effects, and this cycle keeps on going.
Diverging Lines Of Thoughts
There are differing mindsets of people for this concept. Some believe that karma makes the endless knots of cause and effect. So, they dispel their doubts about 'karma and serendipity' by the thought that one should do good to have good. If they help a troubled person, they don't expect anything in return from him. They be kind to others in a belief that they will be helped back by somebody, when they will be in trouble. Well, that's how they are convinced that good deeds can reduce the difficulties from their destiny (as the fruits of those good deeds).
In parallel to people with a strong belief that goods deed are directly proportional to a good life, there are people with a different thinking. They believe that everything is predestined and their deeds can't change what is already decided to happen in their lives. So, they feel free from the obligation of doing good, to face bad effects in future.
Looking For A Better Option? Take The Best Of Both Worlds!
While the difference in thoughts divides the people in two groups where a group believes in the proof of karma and the other doesn't, there is one more group that is not much discernible between them. This category of people are quite puzzled with these thoughts and seek for others' views to decide for their own.
Well, one can choose the best of both worlds. A person should do good deeds but not because of insecurity for future but because that's the best one can do. In this situation, one is free from the fear or obligation to be kind to others and does good, not in expectation to receive good but only for the sake of morality and ethics.