Life is this simple:
It is really a measure of your heart, either you are good or bad person.
Those with bad heart cannot be successful and must be endowed with more suffering. Failure to recognize this theory caused us to dwindle from day to day.
The worst human being in this world are those with a lot of money and came with bad heart. The most pitiful human being in this world are those with little money and came with a lot of resentment and hatred. If they can get rid of such negative energy, good things will follow.
For decades, people doubt such theories, mainly because everybody want to be god, everybody want to be more than themselves. They want to have more intelligence, more sex, more money and etc.
This is why one needs to make a vow in order to have a wish granted on their behalf.
In conclusion, cultivation of the heart is important.