It is natural and justifiable for man to always aspire for good things in life. It is because of this that numerous activities are taking place through him and he keeps enjoying their fruits birth after birth (till he attains jnana). But nowadays some people have doubts--“We are doing many good acts. Will they bear fruit?”
Sastra says that all acts will definitely yield results. For example, good karmas will give good results and bad karmas bad results. There is no doubt about it.
It is in the interest of man that Sastra says, “Keep doing good karmas only; you will enjoy good results not only in this world, but in the world above.”
It means that even if a cow is moving amidst a thousand cows, its calf will find its mother. Likewise, man's karmas will also follow him to confer results. Therefore, let no one doubt whether all good karmas will go waste while bad karmas do have their impact. In fact, punya karmas (good activities) give results faster.
On the other hand, bad karmas give bad results by and by and ultimately destroy the doer. We bless all to understand this well and keep doing good alone.