When you set in motion negative forces, you will generate negative feelings or effects. Whatever whether we choose good or evil, we will reap the result of our desire of our choice. Thus every day, every hour, every minute of our lives, we are creating the causes that determine our fate and our future. When a person is afflicted with a heart problem, he bemoans his fate. If only he would look carefully at his actions, he will realize he has been eating the wrong kind of food, leading to the wrong kind of lifestyle and choosing bad habits over good ones. A bad lifestyle was the cause; the heart problem is the effect. He himself has created his "fate." Disease or good health; success or failure; poverty or wealth; all these are the effects of causes we have created in our past.
However we can change the effect on our fate if we choose the right way through right action. Let me give an example when we are ill, we go to a doctor. This is one way to minimize, mitigate the bad effects of our illness. However, when the disease is deep-rooted, the underlying cause has to be eliminated. Another way to change fate is to resist the effects of our causes.