You touch a burning rod and you feel very hot. In this process of touching feeling, which is an action and reaction, there are many other processes which happen. The nerve cells in the body carry the signal to brain that some signal has entered and then brain decided how to react to this signal. The neurons bring the signal back and we feel that it is hot. Now it happens so fast that it is beyond human comprehension to calculate the time it has taken for various signals to travel through various parts of the body. However, the most important thing is we feel hot at the same point where we have touched the hot rod. We do not feel hot at leg when we have touched the rod by hand. This process looks simple but signifies the process of working of this Universe. This Universe is also like one body and the light is the source of all the activities light is as same as superconsciousness or God. Now the signal whether good or bad is generated at one cell say one entity like human body and goes to super consciousness and after travelling through that comes back to same entity and the reaction is felt. What you do is the action and what you receive is the reaction. When something is happening and you wonder why it is me, you can always look at where it had started. Instead of blaming you can accept the responsibility that how this signal was generated. It would become very easy to accept the pain and to bear it as you would know you have created it. You feel helpless as you think you did not have any role to play. Whenever you do something always be assured that reaction would come. Now whether it is good or bad depends on you.